/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/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:53:14,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:53:14,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:53:14,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:53:14,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:53:14,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:53:14,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:53:14,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:53:14,650 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:53:14,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:53:14,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:53:14,651 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:53:14,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:53:14,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:53:14,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:53:14,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:53:14,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:53:14,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:53:14,652 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:53:14,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:53:14,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:53:14,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:53:14,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:53:14,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:53:14,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:53:14,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:53:14,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:53:14,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:53:14,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:53:14,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:53:14,654 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:53:14,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:53:14,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:53:14,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:53:14,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:53:14,847 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:53:14,848 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:53:14,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-02-15 01:53:14,892 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304c34655/7bbfd90cf9c0409b8308703b9ffc18ff/FLAGd90f6d60f [2022-02-15 01:53:15,286 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:53:15,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-02-15 01:53:15,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304c34655/7bbfd90cf9c0409b8308703b9ffc18ff/FLAGd90f6d60f [2022-02-15 01:53:15,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304c34655/7bbfd90cf9c0409b8308703b9ffc18ff [2022-02-15 01:53:15,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:53:15,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:53:15,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:53:15,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:53:15,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:53:15,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:53:15" (1/1) ... [2022-02-15 01:53:15,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196f413f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15, skipping insertion in model container [2022-02-15 01:53:15,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:53:15" (1/1) ... [2022-02-15 01:53:15,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:53:15,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:53:15,463 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-02-15 01:53:15,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:53:15,488 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:53:15,497 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-02-15 01:53:15,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:53:15,509 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:53:15,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15 WrapperNode [2022-02-15 01:53:15,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:53:15,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:53:15,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:53:15,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:53:15,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15" (1/1) ... [2022-02-15 01:53:15,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15" (1/1) ... [2022-02-15 01:53:15,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15" (1/1) ... [2022-02-15 01:53:15,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15" (1/1) ... [2022-02-15 01:53:15,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15" (1/1) ... [2022-02-15 01:53:15,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15" (1/1) ... [2022-02-15 01:53:15,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15" (1/1) ... [2022-02-15 01:53:15,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:53:15,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:53:15,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:53:15,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:53:15,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15" (1/1) ... [2022-02-15 01:53:15,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:53:15,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:53:15,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:53:15,591 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 [2022-02-15 01:53:15,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:53:15,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:53:15,600 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:53:15,600 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 01:53:15,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:53:15,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:53:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 01:53:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:53:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:53:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:53:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:53:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 01:53:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:53:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:53:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:53:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:53:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:53:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:53:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:53:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:53:15,653 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:53:15,655 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:53:15,739 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:53:15,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:53:15,753 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 01:53:15,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:53:15 BoogieIcfgContainer [2022-02-15 01:53:15,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:53:15,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:53:15,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:53:15,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:53:15,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:53:15" (1/3) ... [2022-02-15 01:53:15,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc43292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:53:15, skipping insertion in model container [2022-02-15 01:53:15,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:53:15" (2/3) ... [2022-02-15 01:53:15,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc43292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:53:15, skipping insertion in model container [2022-02-15 01:53:15,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:53:15" (3/3) ... [2022-02-15 01:53:15,771 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.c [2022-02-15 01:53:15,774 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:53:15,774 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:53:15,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:53:15,826 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 [2022-02-15 01:53:15,826 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:53:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-02-15 01:53:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 01:53:15,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:15,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:15,847 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash -380103047, now seen corresponding path program 1 times [2022-02-15 01:53:15,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:15,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8134324] [2022-02-15 01:53:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:15,901 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:16,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:16,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:16,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8134324] [2022-02-15 01:53:16,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [8134324] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:16,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:16,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:53:16,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343818231] [2022-02-15 01:53:16,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:16,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:53:16,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:53:16,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:53:16,124 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:16,227 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-02-15 01:53:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:53:16,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 01:53:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:16,234 INFO L225 Difference]: With dead ends: 36 [2022-02-15 01:53:16,234 INFO L226 Difference]: Without dead ends: 16 [2022-02-15 01:53:16,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:53:16,240 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:16,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-15 01:53:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-02-15 01:53:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-02-15 01:53:16,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-02-15 01:53:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:16,270 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-02-15 01:53:16,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-02-15 01:53:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:53:16,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:16,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:16,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:53:16,272 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:16,274 INFO L85 PathProgramCache]: Analyzing trace with hash 437044508, now seen corresponding path program 1 times [2022-02-15 01:53:16,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:16,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3358367] [2022-02-15 01:53:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:16,505 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:16,506 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:53:16,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:16,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:16,912 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:16,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3358367] [2022-02-15 01:53:16,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [3358367] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:16,913 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:16,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:53:16,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372377660] [2022-02-15 01:53:16,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:16,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:53:16,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:16,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:53:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:16,915 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:17,600 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-02-15 01:53:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:53:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:17,601 INFO L225 Difference]: With dead ends: 24 [2022-02-15 01:53:17,601 INFO L226 Difference]: Without dead ends: 18 [2022-02-15 01:53:17,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:53:17,603 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:17,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:53:17,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-15 01:53:17,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-02-15 01:53:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-15 01:53:17,608 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2022-02-15 01:53:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:17,608 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-15 01:53:17,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-15 01:53:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:53:17,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:17,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:17,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:53:17,609 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2082915426, now seen corresponding path program 1 times [2022-02-15 01:53:17,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:17,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727583108] [2022-02-15 01:53:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:17,719 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:53:17,720 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:53:17,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:17,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:17,998 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:17,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727583108] [2022-02-15 01:53:17,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [727583108] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:17,998 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:17,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:53:17,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205899124] [2022-02-15 01:53:17,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:17,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:53:17,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:17,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:53:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:18,000 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:18,348 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-02-15 01:53:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:53:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:18,349 INFO L225 Difference]: With dead ends: 26 [2022-02-15 01:53:18,349 INFO L226 Difference]: Without dead ends: 20 [2022-02-15 01:53:18,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:53:18,350 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:18,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-15 01:53:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-15 01:53:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-02-15 01:53:18,357 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2022-02-15 01:53:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:18,357 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-02-15 01:53:18,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-02-15 01:53:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 01:53:18,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:18,358 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:18,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:53:18,358 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:18,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:18,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1511837057, now seen corresponding path program 1 times [2022-02-15 01:53:18,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:18,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738022538] [2022-02-15 01:53:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:18,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:18,361 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:18,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:18,362 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:18,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:18,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:18,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738022538] [2022-02-15 01:53:18,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [738022538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:18,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:18,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:53:18,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996135462] [2022-02-15 01:53:18,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:18,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:53:18,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:18,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:53:18,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:53:18,403 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:18,478 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-15 01:53:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:53:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-15 01:53:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:18,480 INFO L225 Difference]: With dead ends: 34 [2022-02-15 01:53:18,480 INFO L226 Difference]: Without dead ends: 28 [2022-02-15 01:53:18,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:53:18,488 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:18,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-15 01:53:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2022-02-15 01:53:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-02-15 01:53:18,495 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2022-02-15 01:53:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:18,495 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-02-15 01:53:18,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-02-15 01:53:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 01:53:18,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:18,496 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:18,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:53:18,496 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash 416888065, now seen corresponding path program 2 times [2022-02-15 01:53:18,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:18,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592809507] [2022-02-15 01:53:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:18,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:18,498 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:18,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:18,499 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:18,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:18,540 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:18,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592809507] [2022-02-15 01:53:18,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [592809507] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:18,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:18,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:53:18,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376281985] [2022-02-15 01:53:18,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:18,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:53:18,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:18,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:53:18,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:53:18,542 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:18,608 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-02-15 01:53:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:53:18,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-15 01:53:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:18,611 INFO L225 Difference]: With dead ends: 35 [2022-02-15 01:53:18,614 INFO L226 Difference]: Without dead ends: 29 [2022-02-15 01:53:18,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:53:18,620 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:18,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-15 01:53:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-02-15 01:53:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-02-15 01:53:18,626 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2022-02-15 01:53:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:18,626 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-02-15 01:53:18,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-02-15 01:53:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 01:53:18,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:18,627 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:18,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:53:18,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1379700060, now seen corresponding path program 3 times [2022-02-15 01:53:18,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:18,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248359762] [2022-02-15 01:53:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:18,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:18,629 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:18,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:18,630 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:18,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:18,703 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:18,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248359762] [2022-02-15 01:53:18,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248359762] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:18,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:18,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:53:18,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468307102] [2022-02-15 01:53:18,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:18,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:53:18,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:53:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:53:18,705 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:18,790 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-02-15 01:53:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:53:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-15 01:53:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:18,792 INFO L225 Difference]: With dead ends: 40 [2022-02-15 01:53:18,792 INFO L226 Difference]: Without dead ends: 34 [2022-02-15 01:53:18,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:18,794 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:18,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 17 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-15 01:53:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-02-15 01:53:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-02-15 01:53:18,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2022-02-15 01:53:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:18,807 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-02-15 01:53:18,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,807 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-02-15 01:53:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 01:53:18,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:18,809 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:18,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:53:18,809 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:18,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:18,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1820318244, now seen corresponding path program 4 times [2022-02-15 01:53:18,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:18,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677277503] [2022-02-15 01:53:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:18,812 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:18,813 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:18,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:18,815 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:18,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:18,882 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:18,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677277503] [2022-02-15 01:53:18,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [677277503] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:18,882 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:18,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:53:18,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557552417] [2022-02-15 01:53:18,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:18,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:53:18,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:53:18,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:53:18,883 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:18,963 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-02-15 01:53:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:53:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-15 01:53:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:18,964 INFO L225 Difference]: With dead ends: 44 [2022-02-15 01:53:18,964 INFO L226 Difference]: Without dead ends: 38 [2022-02-15 01:53:18,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:18,965 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:18,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 19 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-15 01:53:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-02-15 01:53:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-02-15 01:53:18,973 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 18 [2022-02-15 01:53:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:18,973 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-02-15 01:53:18,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-02-15 01:53:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 01:53:18,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:18,974 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:18,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:53:18,974 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1841324452, now seen corresponding path program 5 times [2022-02-15 01:53:18,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:18,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779576609] [2022-02-15 01:53:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:18,976 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:18,976 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:18,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:18,977 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:19,017 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:19,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779576609] [2022-02-15 01:53:19,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [779576609] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:19,018 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:19,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:53:19,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266320761] [2022-02-15 01:53:19,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:19,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:53:19,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:53:19,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:53:19,019 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:19,098 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-02-15 01:53:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:53:19,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-15 01:53:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:19,099 INFO L225 Difference]: With dead ends: 44 [2022-02-15 01:53:19,099 INFO L226 Difference]: Without dead ends: 38 [2022-02-15 01:53:19,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:19,100 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:19,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 19 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-15 01:53:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-02-15 01:53:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-02-15 01:53:19,116 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 18 [2022-02-15 01:53:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:19,116 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-02-15 01:53:19,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-02-15 01:53:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:53:19,116 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:19,116 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:19,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:53:19,117 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1303028985, now seen corresponding path program 6 times [2022-02-15 01:53:19,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:19,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164951135] [2022-02-15 01:53:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:19,118 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:19,119 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:19,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:19,119 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:19,166 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:19,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164951135] [2022-02-15 01:53:19,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164951135] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:19,166 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:19,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:53:19,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610361520] [2022-02-15 01:53:19,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:19,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:53:19,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:53:19,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:53:19,167 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:19,262 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-02-15 01:53:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:53:19,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-15 01:53:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:19,263 INFO L225 Difference]: With dead ends: 46 [2022-02-15 01:53:19,263 INFO L226 Difference]: Without dead ends: 40 [2022-02-15 01:53:19,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:19,263 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:19,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:19,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-15 01:53:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-02-15 01:53:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-02-15 01:53:19,272 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 20 [2022-02-15 01:53:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:19,272 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-02-15 01:53:19,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-02-15 01:53:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:53:19,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:19,273 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:19,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:53:19,273 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:19,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:19,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1896989319, now seen corresponding path program 7 times [2022-02-15 01:53:19,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:19,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844067045] [2022-02-15 01:53:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:19,275 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:19,275 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:19,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:19,276 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:19,319 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:19,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844067045] [2022-02-15 01:53:19,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [844067045] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:19,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:19,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:53:19,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430099722] [2022-02-15 01:53:19,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:19,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:53:19,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:53:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:53:19,320 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:19,428 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-02-15 01:53:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:53:19,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-15 01:53:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:19,430 INFO L225 Difference]: With dead ends: 50 [2022-02-15 01:53:19,431 INFO L226 Difference]: Without dead ends: 44 [2022-02-15 01:53:19,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:19,431 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:19,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-15 01:53:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-02-15 01:53:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-02-15 01:53:19,452 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 20 [2022-02-15 01:53:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:19,452 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-02-15 01:53:19,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-02-15 01:53:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:53:19,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:19,456 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:19,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:53:19,456 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:19,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1917995527, now seen corresponding path program 8 times [2022-02-15 01:53:19,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:19,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537474566] [2022-02-15 01:53:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:19,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:19,459 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:19,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:19,461 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:19,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:19,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537474566] [2022-02-15 01:53:19,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [537474566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:19,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:19,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:53:19,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306446396] [2022-02-15 01:53:19,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:19,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:53:19,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:19,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:53:19,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:53:19,517 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:19,613 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-02-15 01:53:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:53:19,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-15 01:53:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:19,614 INFO L225 Difference]: With dead ends: 56 [2022-02-15 01:53:19,614 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 01:53:19,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:19,614 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:19,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 01:53:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-02-15 01:53:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-02-15 01:53:19,623 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 20 [2022-02-15 01:53:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:19,623 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-02-15 01:53:19,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-02-15 01:53:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:53:19,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:19,623 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:19,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:53:19,624 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:19,624 INFO L85 PathProgramCache]: Analyzing trace with hash 630124935, now seen corresponding path program 9 times [2022-02-15 01:53:19,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:19,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810186306] [2022-02-15 01:53:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:19,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:19,626 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:19,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:19,627 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:19,669 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:19,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810186306] [2022-02-15 01:53:19,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [810186306] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:19,670 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:19,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:53:19,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802901301] [2022-02-15 01:53:19,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:19,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:53:19,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:19,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:53:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:53:19,671 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:19,782 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-02-15 01:53:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:53:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-15 01:53:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:19,783 INFO L225 Difference]: With dead ends: 54 [2022-02-15 01:53:19,783 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 01:53:19,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:19,784 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:19,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 01:53:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2022-02-15 01:53:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-02-15 01:53:19,793 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 20 [2022-02-15 01:53:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:19,793 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-02-15 01:53:19,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,793 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-02-15 01:53:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:53:19,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:19,793 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:19,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:53:19,794 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:19,794 INFO L85 PathProgramCache]: Analyzing trace with hash -636569942, now seen corresponding path program 10 times [2022-02-15 01:53:19,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:19,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232873708] [2022-02-15 01:53:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:19,795 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:19,795 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:19,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:19,796 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:19,848 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:19,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232873708] [2022-02-15 01:53:19,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [232873708] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:19,849 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:19,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:53:19,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124557475] [2022-02-15 01:53:19,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:19,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:53:19,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:19,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:53:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:53:19,850 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:19,972 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-02-15 01:53:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:53:19,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:19,972 INFO L225 Difference]: With dead ends: 52 [2022-02-15 01:53:19,972 INFO L226 Difference]: Without dead ends: 46 [2022-02-15 01:53:19,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:19,973 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:19,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-15 01:53:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-02-15 01:53:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-02-15 01:53:19,981 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 22 [2022-02-15 01:53:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:19,981 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-02-15 01:53:19,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-02-15 01:53:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:53:19,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:19,982 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:19,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:53:19,982 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:19,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1731518934, now seen corresponding path program 11 times [2022-02-15 01:53:19,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:19,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983804004] [2022-02-15 01:53:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:19,984 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:19,984 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:19,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:19,985 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:20,050 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:20,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983804004] [2022-02-15 01:53:20,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983804004] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:20,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:20,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:53:20,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205408730] [2022-02-15 01:53:20,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:20,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:53:20,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:20,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:53:20,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:53:20,051 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:20,165 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-02-15 01:53:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:53:20,167 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:20,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:20,167 INFO L225 Difference]: With dead ends: 56 [2022-02-15 01:53:20,167 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 01:53:20,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:20,168 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:20,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 17 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 01:53:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-02-15 01:53:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2022-02-15 01:53:20,176 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 22 [2022-02-15 01:53:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:20,176 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2022-02-15 01:53:20,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2022-02-15 01:53:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:53:20,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:20,177 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:20,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:53:20,177 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1710512726, now seen corresponding path program 12 times [2022-02-15 01:53:20,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:20,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808684638] [2022-02-15 01:53:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:20,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:20,179 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:20,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:20,179 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:20,227 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:20,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808684638] [2022-02-15 01:53:20,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [808684638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:20,228 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:20,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:53:20,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114219897] [2022-02-15 01:53:20,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:20,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:53:20,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:20,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:53:20,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:53:20,229 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:20,341 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2022-02-15 01:53:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:53:20,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:20,342 INFO L225 Difference]: With dead ends: 62 [2022-02-15 01:53:20,342 INFO L226 Difference]: Without dead ends: 56 [2022-02-15 01:53:20,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:20,342 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:20,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:20,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-15 01:53:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2022-02-15 01:53:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-02-15 01:53:20,351 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 22 [2022-02-15 01:53:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:20,351 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-02-15 01:53:20,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-02-15 01:53:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:53:20,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:20,352 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:20,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:53:20,352 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1296583978, now seen corresponding path program 13 times [2022-02-15 01:53:20,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:20,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718855506] [2022-02-15 01:53:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:20,353 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:20,354 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:20,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:20,354 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:20,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:20,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718855506] [2022-02-15 01:53:20,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1718855506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:20,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:20,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:53:20,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929789127] [2022-02-15 01:53:20,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:20,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:53:20,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:20,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:53:20,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:53:20,402 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:20,507 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-02-15 01:53:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:53:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:20,508 INFO L225 Difference]: With dead ends: 68 [2022-02-15 01:53:20,508 INFO L226 Difference]: Without dead ends: 62 [2022-02-15 01:53:20,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:20,509 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:20,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:20,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-15 01:53:20,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2022-02-15 01:53:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-02-15 01:53:20,517 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 22 [2022-02-15 01:53:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:20,518 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-02-15 01:53:20,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-02-15 01:53:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:53:20,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:20,518 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:20,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:53:20,518 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:20,519 INFO L85 PathProgramCache]: Analyzing trace with hash 603526314, now seen corresponding path program 14 times [2022-02-15 01:53:20,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:20,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49161321] [2022-02-15 01:53:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:20,520 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:20,520 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:20,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:20,521 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:20,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:20,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49161321] [2022-02-15 01:53:20,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [49161321] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:20,570 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:20,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:53:20,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579975898] [2022-02-15 01:53:20,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:20,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:53:20,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:20,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:53:20,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:53:20,571 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:20,682 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2022-02-15 01:53:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:53:20,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:20,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:20,683 INFO L225 Difference]: With dead ends: 64 [2022-02-15 01:53:20,683 INFO L226 Difference]: Without dead ends: 58 [2022-02-15 01:53:20,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:20,684 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:20,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-15 01:53:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2022-02-15 01:53:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2022-02-15 01:53:20,692 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 22 [2022-02-15 01:53:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:20,692 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2022-02-15 01:53:20,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2022-02-15 01:53:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 01:53:20,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:20,692 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:20,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:53:20,693 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:20,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash -119556723, now seen corresponding path program 15 times [2022-02-15 01:53:20,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:20,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800892356] [2022-02-15 01:53:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:20,694 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:20,694 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:20,695 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:20,752 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:20,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800892356] [2022-02-15 01:53:20,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800892356] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:20,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:20,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:53:20,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816736450] [2022-02-15 01:53:20,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:20,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:53:20,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:20,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:53:20,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:53:20,753 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:20,912 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-02-15 01:53:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:53:20,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-15 01:53:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:20,913 INFO L225 Difference]: With dead ends: 58 [2022-02-15 01:53:20,913 INFO L226 Difference]: Without dead ends: 52 [2022-02-15 01:53:20,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:20,913 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:20,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-15 01:53:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-02-15 01:53:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-02-15 01:53:20,922 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 24 [2022-02-15 01:53:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:20,922 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-02-15 01:53:20,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-02-15 01:53:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 01:53:20,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:20,923 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:20,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:53:20,923 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:20,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:20,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1214505715, now seen corresponding path program 16 times [2022-02-15 01:53:20,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:20,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257656311] [2022-02-15 01:53:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:20,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:20,925 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:20,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:20,925 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:20,990 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:20,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257656311] [2022-02-15 01:53:20,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [257656311] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:20,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:20,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:53:20,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691948881] [2022-02-15 01:53:20,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:20,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:53:20,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:20,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:53:20,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:53:20,992 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:21,130 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2022-02-15 01:53:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:53:21,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-15 01:53:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:21,131 INFO L225 Difference]: With dead ends: 62 [2022-02-15 01:53:21,131 INFO L226 Difference]: Without dead ends: 56 [2022-02-15 01:53:21,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:21,132 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:21,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:21,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-15 01:53:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-02-15 01:53:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-02-15 01:53:21,142 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 24 [2022-02-15 01:53:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:21,142 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-02-15 01:53:21,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-02-15 01:53:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 01:53:21,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:21,143 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:21,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:53:21,143 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1193499507, now seen corresponding path program 17 times [2022-02-15 01:53:21,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:21,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155804581] [2022-02-15 01:53:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:21,145 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:21,145 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:21,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:21,146 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:21,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:21,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:21,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155804581] [2022-02-15 01:53:21,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155804581] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:21,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:21,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:53:21,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189071262] [2022-02-15 01:53:21,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:21,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:53:21,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:21,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:53:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:53:21,210 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:21,356 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-02-15 01:53:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:53:21,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-15 01:53:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:21,357 INFO L225 Difference]: With dead ends: 68 [2022-02-15 01:53:21,357 INFO L226 Difference]: Without dead ends: 62 [2022-02-15 01:53:21,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:21,358 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:21,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:21,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-15 01:53:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-02-15 01:53:21,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-02-15 01:53:21,368 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 24 [2022-02-15 01:53:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:21,368 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-02-15 01:53:21,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-02-15 01:53:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 01:53:21,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:21,369 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:21,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:53:21,369 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1813597197, now seen corresponding path program 18 times [2022-02-15 01:53:21,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:21,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891036582] [2022-02-15 01:53:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:21,371 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:21,371 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:21,372 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:21,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:21,430 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:21,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891036582] [2022-02-15 01:53:21,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1891036582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:21,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:21,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:53:21,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593162741] [2022-02-15 01:53:21,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:21,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:53:21,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:21,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:53:21,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:53:21,431 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:21,570 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-02-15 01:53:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:53:21,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-15 01:53:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:21,571 INFO L225 Difference]: With dead ends: 74 [2022-02-15 01:53:21,571 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 01:53:21,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:21,571 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:21,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 23 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 01:53:21,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2022-02-15 01:53:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2022-02-15 01:53:21,582 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 24 [2022-02-15 01:53:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:21,582 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2022-02-15 01:53:21,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,582 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2022-02-15 01:53:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 01:53:21,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:21,582 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:21,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:53:21,583 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:21,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:21,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1120539533, now seen corresponding path program 19 times [2022-02-15 01:53:21,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:21,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52009198] [2022-02-15 01:53:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:21,584 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:21,584 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:21,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:21,585 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:21,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:21,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52009198] [2022-02-15 01:53:21,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [52009198] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:21,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:21,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:53:21,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080674597] [2022-02-15 01:53:21,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:21,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:53:21,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:21,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:53:21,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:53:21,646 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:21,787 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-02-15 01:53:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:53:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-15 01:53:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:21,789 INFO L225 Difference]: With dead ends: 80 [2022-02-15 01:53:21,789 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 01:53:21,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:21,790 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:21,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 17 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 01:53:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2022-02-15 01:53:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-02-15 01:53:21,800 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 24 [2022-02-15 01:53:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:21,801 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-02-15 01:53:21,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-02-15 01:53:21,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 01:53:21,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:21,801 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:21,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:53:21,801 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:21,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:21,802 INFO L85 PathProgramCache]: Analyzing trace with hash 812055309, now seen corresponding path program 20 times [2022-02-15 01:53:21,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:21,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600844965] [2022-02-15 01:53:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:21,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:21,803 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:21,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:21,804 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:21,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:21,864 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:21,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600844965] [2022-02-15 01:53:21,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1600844965] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:21,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:21,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:53:21,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094147437] [2022-02-15 01:53:21,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:21,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:53:21,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:21,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:53:21,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:53:21,866 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:22,007 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-02-15 01:53:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:53:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-15 01:53:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:22,008 INFO L225 Difference]: With dead ends: 74 [2022-02-15 01:53:22,008 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 01:53:22,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:22,009 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:22,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 01:53:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2022-02-15 01:53:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-02-15 01:53:22,019 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 24 [2022-02-15 01:53:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:22,019 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-02-15 01:53:22,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-02-15 01:53:22,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:53:22,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:22,019 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:22,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:53:22,020 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:22,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1486059600, now seen corresponding path program 21 times [2022-02-15 01:53:22,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:22,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313818855] [2022-02-15 01:53:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:22,021 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:22,021 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:22,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:22,022 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:22,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:22,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:22,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313818855] [2022-02-15 01:53:22,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313818855] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:22,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:22,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:53:22,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140664728] [2022-02-15 01:53:22,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:22,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:53:22,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:53:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:53:22,109 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:22,253 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2022-02-15 01:53:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:53:22,254 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:53:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:22,254 INFO L225 Difference]: With dead ends: 64 [2022-02-15 01:53:22,254 INFO L226 Difference]: Without dead ends: 58 [2022-02-15 01:53:22,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:53:22,255 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:22,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 19 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-15 01:53:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-02-15 01:53:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2022-02-15 01:53:22,266 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 26 [2022-02-15 01:53:22,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:22,267 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2022-02-15 01:53:22,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2022-02-15 01:53:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:53:22,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:22,268 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:22,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:53:22,268 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1713958704, now seen corresponding path program 22 times [2022-02-15 01:53:22,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:22,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513815360] [2022-02-15 01:53:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:22,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:22,273 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:22,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:22,274 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:22,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:22,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:22,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513815360] [2022-02-15 01:53:22,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [513815360] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:22,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:22,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:53:22,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285342641] [2022-02-15 01:53:22,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:22,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:53:22,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:53:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:53:22,364 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:22,534 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-02-15 01:53:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:53:22,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:53:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:22,534 INFO L225 Difference]: With dead ends: 68 [2022-02-15 01:53:22,534 INFO L226 Difference]: Without dead ends: 62 [2022-02-15 01:53:22,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:53:22,535 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:22,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-15 01:53:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-02-15 01:53:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-02-15 01:53:22,546 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 26 [2022-02-15 01:53:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:22,547 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-02-15 01:53:22,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-02-15 01:53:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:53:22,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:22,547 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:22,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:53:22,547 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1734964912, now seen corresponding path program 23 times [2022-02-15 01:53:22,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:22,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108057311] [2022-02-15 01:53:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:22,549 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:22,549 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:22,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:22,550 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:22,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:22,612 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:22,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108057311] [2022-02-15 01:53:22,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2108057311] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:22,612 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:22,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:53:22,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626059439] [2022-02-15 01:53:22,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:22,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:53:22,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:53:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:53:22,613 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:22,768 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-02-15 01:53:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:53:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:53:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:22,769 INFO L225 Difference]: With dead ends: 74 [2022-02-15 01:53:22,769 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 01:53:22,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:53:22,770 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:22,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 01:53:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2022-02-15 01:53:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2022-02-15 01:53:22,782 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 26 [2022-02-15 01:53:22,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:22,782 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2022-02-15 01:53:22,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,782 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2022-02-15 01:53:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:53:22,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:22,783 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:22,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:53:22,783 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:22,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:22,783 INFO L85 PathProgramCache]: Analyzing trace with hash 447094320, now seen corresponding path program 24 times [2022-02-15 01:53:22,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:22,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993735638] [2022-02-15 01:53:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:22,784 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:22,784 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:22,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:22,785 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:22,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:22,847 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:22,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993735638] [2022-02-15 01:53:22,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [993735638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:22,847 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:22,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:53:22,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290444814] [2022-02-15 01:53:22,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:22,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:53:22,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:22,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:53:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:53:22,849 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:22,992 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-02-15 01:53:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:53:22,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:53:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:22,993 INFO L225 Difference]: With dead ends: 80 [2022-02-15 01:53:22,993 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 01:53:22,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:53:22,994 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:22,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 01:53:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2022-02-15 01:53:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2022-02-15 01:53:23,007 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 26 [2022-02-15 01:53:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:23,007 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2022-02-15 01:53:23,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2022-02-15 01:53:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:53:23,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:23,007 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:23,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:53:23,008 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash -245963344, now seen corresponding path program 25 times [2022-02-15 01:53:23,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:23,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245085130] [2022-02-15 01:53:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:23,009 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:23,009 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:23,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:23,010 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:23,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:23,075 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:23,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245085130] [2022-02-15 01:53:23,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1245085130] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:23,075 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:23,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:53:23,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113045109] [2022-02-15 01:53:23,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:23,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:53:23,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:53:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:53:23,076 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:23,248 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-02-15 01:53:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:53:23,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:53:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:23,248 INFO L225 Difference]: With dead ends: 86 [2022-02-15 01:53:23,248 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 01:53:23,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:53:23,249 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:23,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:23,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 01:53:23,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2022-02-15 01:53:23,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-02-15 01:53:23,262 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 26 [2022-02-15 01:53:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:23,262 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-02-15 01:53:23,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-02-15 01:53:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:53:23,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:23,263 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:23,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:53:23,263 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:23,263 INFO L85 PathProgramCache]: Analyzing trace with hash -554447568, now seen corresponding path program 26 times [2022-02-15 01:53:23,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:23,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2698453] [2022-02-15 01:53:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:23,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:23,264 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:23,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:23,265 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:23,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:23,328 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:23,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2698453] [2022-02-15 01:53:23,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2698453] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:23,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:23,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:53:23,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640530514] [2022-02-15 01:53:23,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:23,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:53:23,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:23,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:53:23,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:53:23,330 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:23,496 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-02-15 01:53:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:53:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:53:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:23,496 INFO L225 Difference]: With dead ends: 92 [2022-02-15 01:53:23,497 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 01:53:23,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:53:23,497 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:23,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:23,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 01:53:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2022-02-15 01:53:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-02-15 01:53:23,510 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 26 [2022-02-15 01:53:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:23,511 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-02-15 01:53:23,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-02-15 01:53:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:53:23,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:23,511 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:23,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:53:23,511 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash -655043408, now seen corresponding path program 27 times [2022-02-15 01:53:23,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:23,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566389365] [2022-02-15 01:53:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:23,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:23,513 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:23,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:23,514 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:23,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:23,581 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:23,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566389365] [2022-02-15 01:53:23,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566389365] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:23,581 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:23,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:53:23,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468796029] [2022-02-15 01:53:23,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:23,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:53:23,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:23,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:53:23,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:53:23,582 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:23,726 INFO L93 Difference]: Finished difference Result 84 states and 116 transitions. [2022-02-15 01:53:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:53:23,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:53:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:23,726 INFO L225 Difference]: With dead ends: 84 [2022-02-15 01:53:23,726 INFO L226 Difference]: Without dead ends: 78 [2022-02-15 01:53:23,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:53:23,729 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:23,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 21 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-15 01:53:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2022-02-15 01:53:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2022-02-15 01:53:23,741 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 26 [2022-02-15 01:53:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:23,741 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2022-02-15 01:53:23,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2022-02-15 01:53:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:53:23,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:23,742 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:23,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:53:23,742 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash -435331821, now seen corresponding path program 28 times [2022-02-15 01:53:23,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:23,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127874417] [2022-02-15 01:53:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:23,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:23,744 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:23,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:23,746 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:23,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:23,845 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:23,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127874417] [2022-02-15 01:53:23,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [127874417] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:23,845 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:23,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:53:23,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404331894] [2022-02-15 01:53:23,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:23,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:53:23,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:23,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:53:23,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:23,846 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:24,041 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2022-02-15 01:53:24,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:53:24,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 01:53:24,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:24,042 INFO L225 Difference]: With dead ends: 70 [2022-02-15 01:53:24,042 INFO L226 Difference]: Without dead ends: 64 [2022-02-15 01:53:24,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:53:24,042 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:24,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 23 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-15 01:53:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-02-15 01:53:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2022-02-15 01:53:24,058 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 28 [2022-02-15 01:53:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:24,058 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2022-02-15 01:53:24,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2022-02-15 01:53:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:53:24,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:24,059 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:24,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:53:24,059 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:24,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:24,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1530280813, now seen corresponding path program 29 times [2022-02-15 01:53:24,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:24,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602278043] [2022-02-15 01:53:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:24,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:24,061 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:24,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:24,061 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:24,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:24,143 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:24,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602278043] [2022-02-15 01:53:24,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602278043] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:24,143 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:24,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:53:24,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102289187] [2022-02-15 01:53:24,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:24,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:53:24,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:24,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:53:24,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:24,144 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:24,303 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-02-15 01:53:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:53:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 01:53:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:24,304 INFO L225 Difference]: With dead ends: 74 [2022-02-15 01:53:24,304 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 01:53:24,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:53:24,304 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:24,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 15 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 01:53:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-02-15 01:53:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-02-15 01:53:24,319 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 28 [2022-02-15 01:53:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:24,319 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-02-15 01:53:24,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-02-15 01:53:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:53:24,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:24,319 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:24,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:53:24,319 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:24,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:24,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1509274605, now seen corresponding path program 30 times [2022-02-15 01:53:24,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:24,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096712618] [2022-02-15 01:53:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:24,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:24,321 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:24,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:24,322 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:24,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:24,393 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:24,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096712618] [2022-02-15 01:53:24,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1096712618] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:24,393 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:24,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:53:24,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279180993] [2022-02-15 01:53:24,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:24,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:53:24,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:53:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:24,394 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:24,562 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-02-15 01:53:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:53:24,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 01:53:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:24,563 INFO L225 Difference]: With dead ends: 80 [2022-02-15 01:53:24,563 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 01:53:24,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:53:24,564 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:24,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 01:53:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2022-02-15 01:53:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-02-15 01:53:24,579 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 28 [2022-02-15 01:53:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:24,579 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-02-15 01:53:24,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-02-15 01:53:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:53:24,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:24,580 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:24,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:53:24,580 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1497822099, now seen corresponding path program 31 times [2022-02-15 01:53:24,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:24,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605806099] [2022-02-15 01:53:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:24,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:24,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:24,582 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:24,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:24,652 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:24,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605806099] [2022-02-15 01:53:24,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1605806099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:24,652 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:24,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:53:24,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36615082] [2022-02-15 01:53:24,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:24,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:53:24,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:53:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:24,653 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:24,842 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-02-15 01:53:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:53:24,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 01:53:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:24,843 INFO L225 Difference]: With dead ends: 86 [2022-02-15 01:53:24,843 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 01:53:24,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:53:24,844 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:24,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 01:53:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2022-02-15 01:53:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2022-02-15 01:53:24,859 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 28 [2022-02-15 01:53:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:24,859 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2022-02-15 01:53:24,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2022-02-15 01:53:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:53:24,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:24,859 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:24,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:53:24,859 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash 804764435, now seen corresponding path program 32 times [2022-02-15 01:53:24,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:24,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695302810] [2022-02-15 01:53:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:24,861 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:24,861 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:24,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:24,862 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:24,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:24,935 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:24,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695302810] [2022-02-15 01:53:24,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [695302810] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:24,935 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:24,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:53:24,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677507225] [2022-02-15 01:53:24,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:24,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:53:24,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:53:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:24,936 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:25,099 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-02-15 01:53:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:53:25,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 01:53:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:25,100 INFO L225 Difference]: With dead ends: 92 [2022-02-15 01:53:25,100 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 01:53:25,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:53:25,101 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:25,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 01:53:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2022-02-15 01:53:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2022-02-15 01:53:25,117 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 28 [2022-02-15 01:53:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:25,117 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2022-02-15 01:53:25,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2022-02-15 01:53:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:53:25,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:25,117 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:25,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:53:25,117 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:25,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:25,118 INFO L85 PathProgramCache]: Analyzing trace with hash 496280211, now seen corresponding path program 33 times [2022-02-15 01:53:25,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:25,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884437822] [2022-02-15 01:53:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:25,119 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:25,119 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:25,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:25,120 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:25,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:25,187 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:25,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884437822] [2022-02-15 01:53:25,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1884437822] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:25,187 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:25,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:53:25,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438279754] [2022-02-15 01:53:25,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:25,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:53:25,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:53:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:25,188 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:25,348 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-15 01:53:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:53:25,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 01:53:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:25,349 INFO L225 Difference]: With dead ends: 98 [2022-02-15 01:53:25,349 INFO L226 Difference]: Without dead ends: 92 [2022-02-15 01:53:25,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:53:25,350 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:25,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-15 01:53:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2022-02-15 01:53:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-02-15 01:53:25,366 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 28 [2022-02-15 01:53:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:25,366 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-02-15 01:53:25,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-02-15 01:53:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:53:25,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:25,367 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:25,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:53:25,367 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash 395684371, now seen corresponding path program 34 times [2022-02-15 01:53:25,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:25,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080810452] [2022-02-15 01:53:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:25,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:25,369 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:25,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:25,369 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:25,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:25,439 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:25,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080810452] [2022-02-15 01:53:25,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2080810452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:25,439 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:25,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:53:25,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141989530] [2022-02-15 01:53:25,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:25,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:53:25,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:25,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:53:25,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:25,440 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:25,615 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-15 01:53:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:53:25,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 01:53:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:25,616 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:53:25,616 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:53:25,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:53:25,617 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:25,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:53:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2022-02-15 01:53:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2022-02-15 01:53:25,634 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 28 [2022-02-15 01:53:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:25,634 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2022-02-15 01:53:25,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2022-02-15 01:53:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:53:25,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:25,634 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:25,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:53:25,634 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1787637357, now seen corresponding path program 35 times [2022-02-15 01:53:25,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:25,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733564258] [2022-02-15 01:53:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:25,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:25,636 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:25,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:25,637 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:25,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:25,708 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:25,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733564258] [2022-02-15 01:53:25,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [733564258] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:25,708 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:25,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:53:25,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893353993] [2022-02-15 01:53:25,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:25,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:53:25,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:53:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:53:25,709 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:25,872 INFO L93 Difference]: Finished difference Result 94 states and 131 transitions. [2022-02-15 01:53:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:53:25,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 01:53:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:25,873 INFO L225 Difference]: With dead ends: 94 [2022-02-15 01:53:25,873 INFO L226 Difference]: Without dead ends: 88 [2022-02-15 01:53:25,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:53:25,874 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:25,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 15 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-15 01:53:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2022-02-15 01:53:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2022-02-15 01:53:25,888 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 28 [2022-02-15 01:53:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:25,888 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2022-02-15 01:53:25,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2022-02-15 01:53:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:53:25,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:25,889 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:25,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:53:25,889 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash -3250762, now seen corresponding path program 36 times [2022-02-15 01:53:25,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:25,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568315313] [2022-02-15 01:53:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:25,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:25,890 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:25,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:25,891 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:25,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:25,969 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:25,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568315313] [2022-02-15 01:53:25,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568315313] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:25,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:25,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:53:25,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552303251] [2022-02-15 01:53:25,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:25,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:53:25,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:53:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:53:25,970 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:26,164 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2022-02-15 01:53:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:53:26,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:53:26,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:26,165 INFO L225 Difference]: With dead ends: 76 [2022-02-15 01:53:26,165 INFO L226 Difference]: Without dead ends: 70 [2022-02-15 01:53:26,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:53:26,166 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:26,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 21 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-15 01:53:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-02-15 01:53:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-02-15 01:53:26,182 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 30 [2022-02-15 01:53:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:26,182 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-02-15 01:53:26,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-02-15 01:53:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:53:26,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:26,183 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:26,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:53:26,183 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:26,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1098199754, now seen corresponding path program 37 times [2022-02-15 01:53:26,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:26,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343471254] [2022-02-15 01:53:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:26,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:26,185 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:26,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:26,185 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:26,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:26,276 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:26,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343471254] [2022-02-15 01:53:26,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [343471254] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:26,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:26,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:53:26,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102767037] [2022-02-15 01:53:26,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:26,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:53:26,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:53:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:53:26,277 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:26,480 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-02-15 01:53:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:53:26,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:53:26,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:26,480 INFO L225 Difference]: With dead ends: 80 [2022-02-15 01:53:26,481 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 01:53:26,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:53:26,481 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:26,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 17 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 01:53:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-02-15 01:53:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2022-02-15 01:53:26,498 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 30 [2022-02-15 01:53:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:26,499 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2022-02-15 01:53:26,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2022-02-15 01:53:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:53:26,499 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:26,499 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:26,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:53:26,499 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:26,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1077193546, now seen corresponding path program 38 times [2022-02-15 01:53:26,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:26,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75979686] [2022-02-15 01:53:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:26,501 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:26,501 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:26,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:26,502 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:26,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:26,583 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:26,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75979686] [2022-02-15 01:53:26,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [75979686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:26,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:26,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:53:26,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409618449] [2022-02-15 01:53:26,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:26,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:53:26,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:26,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:53:26,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:53:26,585 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:26,769 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-02-15 01:53:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:53:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:53:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:26,770 INFO L225 Difference]: With dead ends: 86 [2022-02-15 01:53:26,770 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 01:53:26,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:53:26,770 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:26,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 01:53:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2022-02-15 01:53:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-02-15 01:53:26,788 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 30 [2022-02-15 01:53:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:26,788 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-02-15 01:53:26,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-02-15 01:53:26,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:53:26,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:26,789 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:26,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:53:26,789 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:26,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:26,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1929903158, now seen corresponding path program 39 times [2022-02-15 01:53:26,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:26,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300558597] [2022-02-15 01:53:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:26,791 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:26,791 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:26,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:26,791 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:26,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:26,874 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:26,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300558597] [2022-02-15 01:53:26,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1300558597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:26,874 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:26,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:53:26,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764278808] [2022-02-15 01:53:26,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:26,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:53:26,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:26,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:53:26,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:53:26,875 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:27,057 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-02-15 01:53:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:53:27,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:53:27,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:27,058 INFO L225 Difference]: With dead ends: 92 [2022-02-15 01:53:27,058 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 01:53:27,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:53:27,059 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:27,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 01:53:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2022-02-15 01:53:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2022-02-15 01:53:27,087 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 30 [2022-02-15 01:53:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:27,087 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2022-02-15 01:53:27,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2022-02-15 01:53:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:53:27,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:27,088 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:27,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:53:27,088 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1236845494, now seen corresponding path program 40 times [2022-02-15 01:53:27,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:27,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020739906] [2022-02-15 01:53:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:27,089 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:27,090 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:27,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:27,090 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:27,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:27,174 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:27,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020739906] [2022-02-15 01:53:27,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2020739906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:27,174 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:27,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:53:27,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455045556] [2022-02-15 01:53:27,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:27,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:53:27,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:27,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:53:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:53:27,175 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:27,368 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-15 01:53:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:53:27,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:53:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:27,369 INFO L225 Difference]: With dead ends: 98 [2022-02-15 01:53:27,369 INFO L226 Difference]: Without dead ends: 92 [2022-02-15 01:53:27,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:53:27,370 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:27,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 21 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:27,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-15 01:53:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2022-02-15 01:53:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.457142857142857) internal successors, (102), 70 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2022-02-15 01:53:27,389 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 30 [2022-02-15 01:53:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:27,389 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2022-02-15 01:53:27,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2022-02-15 01:53:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:53:27,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:27,390 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:27,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:53:27,390 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:27,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:27,390 INFO L85 PathProgramCache]: Analyzing trace with hash 928361270, now seen corresponding path program 41 times [2022-02-15 01:53:27,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:27,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647326816] [2022-02-15 01:53:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:27,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:27,392 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:27,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:27,392 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:27,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:27,474 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:27,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647326816] [2022-02-15 01:53:27,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [647326816] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:27,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:27,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:53:27,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173295178] [2022-02-15 01:53:27,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:27,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:53:27,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:27,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:53:27,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:53:27,475 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:27,668 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-15 01:53:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:53:27,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:53:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:27,669 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:53:27,669 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:53:27,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:53:27,670 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:27,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:53:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 77. [2022-02-15 01:53:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-02-15 01:53:27,690 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 30 [2022-02-15 01:53:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:27,690 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-02-15 01:53:27,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-02-15 01:53:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:53:27,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:27,690 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:27,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:53:27,691 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:27,691 INFO L85 PathProgramCache]: Analyzing trace with hash 827765430, now seen corresponding path program 42 times [2022-02-15 01:53:27,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:27,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487789609] [2022-02-15 01:53:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:27,692 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:27,692 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:27,693 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:27,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:27,781 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:27,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487789609] [2022-02-15 01:53:27,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [487789609] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:27,781 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:27,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:53:27,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356855397] [2022-02-15 01:53:27,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:27,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:53:27,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:27,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:53:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:53:27,782 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:27,973 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-15 01:53:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:53:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:53:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:27,974 INFO L225 Difference]: With dead ends: 110 [2022-02-15 01:53:27,974 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 01:53:27,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:53:27,975 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:27,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 01:53:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2022-02-15 01:53:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-02-15 01:53:27,996 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 30 [2022-02-15 01:53:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:27,996 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-02-15 01:53:27,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-02-15 01:53:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:53:27,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:27,997 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:27,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:53:27,997 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:27,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1355556298, now seen corresponding path program 43 times [2022-02-15 01:53:27,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:27,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285195680] [2022-02-15 01:53:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:27,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:27,998 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:27,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:27,999 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:28,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:28,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:28,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285195680] [2022-02-15 01:53:28,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1285195680] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:28,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:28,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:53:28,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767700456] [2022-02-15 01:53:28,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:28,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:53:28,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:53:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:53:28,109 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:28,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:28,290 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-15 01:53:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:53:28,290 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:53:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:28,290 INFO L225 Difference]: With dead ends: 116 [2022-02-15 01:53:28,290 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:53:28,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:53:28,291 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:28,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 15 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:53:28,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:53:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2022-02-15 01:53:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2022-02-15 01:53:28,313 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 30 [2022-02-15 01:53:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:28,313 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2022-02-15 01:53:28,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2022-02-15 01:53:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:53:28,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:28,314 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:28,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:53:28,314 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash 711270838, now seen corresponding path program 44 times [2022-02-15 01:53:28,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:28,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195105892] [2022-02-15 01:53:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:28,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:28,315 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:28,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:28,316 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:28,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:28,388 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:28,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195105892] [2022-02-15 01:53:28,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [195105892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:28,388 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:28,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:53:28,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732315317] [2022-02-15 01:53:28,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:28,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:53:28,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:53:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:53:28,389 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:28,599 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-15 01:53:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:53:28,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:53:28,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:28,599 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:53:28,600 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:53:28,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:53:28,600 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:28,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 21 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:53:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 67. [2022-02-15 01:53:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2022-02-15 01:53:28,622 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 30 [2022-02-15 01:53:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:28,623 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2022-02-15 01:53:28,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2022-02-15 01:53:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:53:28,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:28,623 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:28,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:53:28,623 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1385180775, now seen corresponding path program 45 times [2022-02-15 01:53:28,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:28,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249556616] [2022-02-15 01:53:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:28,625 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:28,625 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:28,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:28,626 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:28,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:28,723 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:28,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249556616] [2022-02-15 01:53:28,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [249556616] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:28,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:28,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:53:28,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458457180] [2022-02-15 01:53:28,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:28,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:53:28,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:53:28,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:28,725 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:28,929 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2022-02-15 01:53:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:53:28,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:53:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:28,930 INFO L225 Difference]: With dead ends: 82 [2022-02-15 01:53:28,930 INFO L226 Difference]: Without dead ends: 76 [2022-02-15 01:53:28,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:53:28,931 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:28,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 17 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-15 01:53:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-02-15 01:53:28,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-02-15 01:53:28,949 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 32 [2022-02-15 01:53:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:28,949 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-02-15 01:53:28,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-02-15 01:53:28,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:53:28,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:28,950 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:28,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:53:28,950 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:28,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1814837529, now seen corresponding path program 46 times [2022-02-15 01:53:28,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:28,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511284630] [2022-02-15 01:53:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:28,952 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:28,952 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:28,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:28,952 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:29,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:29,057 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:29,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511284630] [2022-02-15 01:53:29,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511284630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:29,057 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:29,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:53:29,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127789136] [2022-02-15 01:53:29,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:29,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:53:29,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:29,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:53:29,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:29,058 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:29,260 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2022-02-15 01:53:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:53:29,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:53:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:29,261 INFO L225 Difference]: With dead ends: 86 [2022-02-15 01:53:29,261 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 01:53:29,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:53:29,262 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:29,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 01:53:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-02-15 01:53:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.457142857142857) internal successors, (102), 70 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2022-02-15 01:53:29,283 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 32 [2022-02-15 01:53:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:29,283 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2022-02-15 01:53:29,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2022-02-15 01:53:29,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:53:29,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:29,283 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:29,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:53:29,283 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:29,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1835843737, now seen corresponding path program 47 times [2022-02-15 01:53:29,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:29,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43619780] [2022-02-15 01:53:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:29,285 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:29,285 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:29,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:29,286 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:29,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:29,378 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:29,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43619780] [2022-02-15 01:53:29,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [43619780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:29,378 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:29,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:53:29,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180936872] [2022-02-15 01:53:29,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:29,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:53:29,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:53:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:29,379 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:29,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:29,618 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-02-15 01:53:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:53:29,618 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:53:29,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:29,618 INFO L225 Difference]: With dead ends: 92 [2022-02-15 01:53:29,619 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 01:53:29,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:53:29,619 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:29,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 23 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 01:53:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2022-02-15 01:53:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-02-15 01:53:29,640 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 32 [2022-02-15 01:53:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:29,641 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-02-15 01:53:29,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-02-15 01:53:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:53:29,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:29,641 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:29,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:53:29,641 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:29,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:29,642 INFO L85 PathProgramCache]: Analyzing trace with hash 547973145, now seen corresponding path program 48 times [2022-02-15 01:53:29,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:29,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472359747] [2022-02-15 01:53:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:29,643 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:29,643 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:29,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:29,643 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:29,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:29,746 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:29,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472359747] [2022-02-15 01:53:29,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472359747] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:29,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:29,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:53:29,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373229761] [2022-02-15 01:53:29,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:29,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:53:29,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:29,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:53:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:29,747 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:29,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:29,954 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-15 01:53:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:53:29,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:53:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:29,955 INFO L225 Difference]: With dead ends: 98 [2022-02-15 01:53:29,955 INFO L226 Difference]: Without dead ends: 92 [2022-02-15 01:53:29,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:53:29,956 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:29,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-15 01:53:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2022-02-15 01:53:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-02-15 01:53:29,978 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 32 [2022-02-15 01:53:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:29,978 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-02-15 01:53:29,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-02-15 01:53:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:53:29,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:29,979 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:29,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:53:29,979 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash -145084519, now seen corresponding path program 49 times [2022-02-15 01:53:29,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:29,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302197584] [2022-02-15 01:53:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:29,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:29,980 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:29,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:29,981 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:30,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:30,066 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:30,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302197584] [2022-02-15 01:53:30,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1302197584] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:30,066 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:30,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:53:30,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323124113] [2022-02-15 01:53:30,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:30,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:53:30,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:30,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:53:30,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:30,067 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:30,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:30,277 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-15 01:53:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:53:30,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:53:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:30,278 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:53:30,278 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:53:30,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:53:30,280 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:30,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 21 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:53:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-02-15 01:53:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2022-02-15 01:53:30,321 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 32 [2022-02-15 01:53:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:30,322 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2022-02-15 01:53:30,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2022-02-15 01:53:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:53:30,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:30,322 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:30,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:53:30,322 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:30,323 INFO L85 PathProgramCache]: Analyzing trace with hash -453568743, now seen corresponding path program 50 times [2022-02-15 01:53:30,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:30,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584279628] [2022-02-15 01:53:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:30,324 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:30,324 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:30,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:30,325 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:30,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:30,408 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:30,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584279628] [2022-02-15 01:53:30,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1584279628] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:30,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:30,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:53:30,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512033348] [2022-02-15 01:53:30,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:30,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:53:30,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:30,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:53:30,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:30,409 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:30,613 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-15 01:53:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:53:30,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:53:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:30,613 INFO L225 Difference]: With dead ends: 110 [2022-02-15 01:53:30,613 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 01:53:30,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:53:30,614 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:30,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 17 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 01:53:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2022-02-15 01:53:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-02-15 01:53:30,638 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 32 [2022-02-15 01:53:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:30,638 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-02-15 01:53:30,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-02-15 01:53:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:53:30,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:30,639 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:30,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:53:30,639 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash -554164583, now seen corresponding path program 51 times [2022-02-15 01:53:30,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:30,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034712864] [2022-02-15 01:53:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:30,640 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:30,640 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:30,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:30,641 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:30,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:30,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:30,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034712864] [2022-02-15 01:53:30,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034712864] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:30,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:30,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:53:30,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086078951] [2022-02-15 01:53:30,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:30,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:53:30,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:30,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:53:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:30,727 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:30,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:30,936 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-15 01:53:30,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:53:30,937 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:53:30,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:30,937 INFO L225 Difference]: With dead ends: 116 [2022-02-15 01:53:30,937 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:53:30,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:53:30,938 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:30,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:30,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:53:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 85. [2022-02-15 01:53:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-02-15 01:53:30,963 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 32 [2022-02-15 01:53:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:30,964 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-02-15 01:53:30,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-02-15 01:53:30,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:53:30,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:30,964 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:30,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 01:53:30,964 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1557480985, now seen corresponding path program 52 times [2022-02-15 01:53:30,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:30,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172960870] [2022-02-15 01:53:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:30,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:30,966 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:30,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:30,966 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:31,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:31,063 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:31,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172960870] [2022-02-15 01:53:31,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172960870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:31,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:31,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:53:31,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29976025] [2022-02-15 01:53:31,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:31,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:53:31,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:53:31,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:31,065 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:31,301 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-15 01:53:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:53:31,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:53:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:31,302 INFO L225 Difference]: With dead ends: 122 [2022-02-15 01:53:31,302 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 01:53:31,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:53:31,302 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:31,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 01:53:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2022-02-15 01:53:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:31,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-02-15 01:53:31,331 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 32 [2022-02-15 01:53:31,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:31,332 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-02-15 01:53:31,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-02-15 01:53:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:53:31,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:31,332 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:31,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 01:53:31,332 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:31,333 INFO L85 PathProgramCache]: Analyzing trace with hash -670659175, now seen corresponding path program 53 times [2022-02-15 01:53:31,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:31,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13165738] [2022-02-15 01:53:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:31,335 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:31,335 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:31,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:31,336 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:31,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:31,441 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:31,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13165738] [2022-02-15 01:53:31,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [13165738] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:31,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:31,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:53:31,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588898988] [2022-02-15 01:53:31,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:31,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:53:31,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:31,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:53:31,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:31,442 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:31,678 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-15 01:53:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:53:31,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:53:31,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:31,679 INFO L225 Difference]: With dead ends: 128 [2022-02-15 01:53:31,679 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:53:31,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:53:31,680 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:31,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 17 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:31,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:53:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2022-02-15 01:53:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-02-15 01:53:31,706 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 32 [2022-02-15 01:53:31,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:31,706 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-02-15 01:53:31,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:31,706 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-02-15 01:53:31,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:53:31,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:31,706 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:31,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 01:53:31,707 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:31,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1275327769, now seen corresponding path program 54 times [2022-02-15 01:53:31,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:31,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841581096] [2022-02-15 01:53:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:31,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:31,708 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:31,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:31,709 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:31,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:31,791 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:31,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841581096] [2022-02-15 01:53:31,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [841581096] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:31,792 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:31,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:53:31,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308936238] [2022-02-15 01:53:31,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:31,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:53:31,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:31,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:53:31,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:53:31,792 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:32,008 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2022-02-15 01:53:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:53:32,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:53:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:32,009 INFO L225 Difference]: With dead ends: 114 [2022-02-15 01:53:32,009 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 01:53:32,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:53:32,010 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:32,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 01:53:32,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 73. [2022-02-15 01:53:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2022-02-15 01:53:32,031 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 32 [2022-02-15 01:53:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:32,032 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2022-02-15 01:53:32,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2022-02-15 01:53:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:32,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:32,032 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:32,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 01:53:32,032 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:32,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:32,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2019938492, now seen corresponding path program 55 times [2022-02-15 01:53:32,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:32,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978377133] [2022-02-15 01:53:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:32,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:32,034 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:32,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:32,035 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:32,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:32,140 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:32,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978377133] [2022-02-15 01:53:32,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1978377133] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:32,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:32,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:32,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993743192] [2022-02-15 01:53:32,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:32,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:32,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:32,141 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:32,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:32,368 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2022-02-15 01:53:32,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:32,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:32,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:32,368 INFO L225 Difference]: With dead ends: 88 [2022-02-15 01:53:32,369 INFO L226 Difference]: Without dead ends: 82 [2022-02-15 01:53:32,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:32,369 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:32,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 21 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-15 01:53:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-02-15 01:53:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-02-15 01:53:32,391 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 34 [2022-02-15 01:53:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:32,391 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-02-15 01:53:32,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-02-15 01:53:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:32,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:32,392 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:32,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 01:53:32,392 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash 924989500, now seen corresponding path program 56 times [2022-02-15 01:53:32,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:32,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133198016] [2022-02-15 01:53:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:32,394 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:32,394 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:32,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:32,394 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:32,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:32,488 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:32,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133198016] [2022-02-15 01:53:32,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133198016] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:32,488 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:32,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:32,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029960361] [2022-02-15 01:53:32,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:32,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:32,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:32,489 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:32,721 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2022-02-15 01:53:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:32,722 INFO L225 Difference]: With dead ends: 92 [2022-02-15 01:53:32,722 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 01:53:32,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:32,723 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:32,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 23 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 01:53:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-02-15 01:53:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2022-02-15 01:53:32,748 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 34 [2022-02-15 01:53:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:32,748 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2022-02-15 01:53:32,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2022-02-15 01:53:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:32,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:32,748 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:32,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 01:53:32,749 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:32,749 INFO L85 PathProgramCache]: Analyzing trace with hash 945995708, now seen corresponding path program 57 times [2022-02-15 01:53:32,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:32,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195406643] [2022-02-15 01:53:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:32,754 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:32,755 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:32,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:32,755 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:32,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:32,856 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:32,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195406643] [2022-02-15 01:53:32,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1195406643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:32,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:32,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:32,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309591197] [2022-02-15 01:53:32,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:32,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:32,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:32,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:32,857 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:33,095 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-15 01:53:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:33,095 INFO L225 Difference]: With dead ends: 98 [2022-02-15 01:53:33,095 INFO L226 Difference]: Without dead ends: 92 [2022-02-15 01:53:33,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:33,096 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:33,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 23 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-15 01:53:33,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2022-02-15 01:53:33,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-02-15 01:53:33,122 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 34 [2022-02-15 01:53:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:33,122 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-02-15 01:53:33,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-02-15 01:53:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:33,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:33,123 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:33,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 01:53:33,123 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:33,123 INFO L85 PathProgramCache]: Analyzing trace with hash -341874884, now seen corresponding path program 58 times [2022-02-15 01:53:33,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:33,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790319278] [2022-02-15 01:53:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:33,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:33,124 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:33,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:33,125 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:33,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:33,219 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:33,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790319278] [2022-02-15 01:53:33,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [790319278] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:33,220 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:33,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:33,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553776651] [2022-02-15 01:53:33,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:33,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:33,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:33,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:33,220 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:33,471 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-15 01:53:33,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:33,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:33,472 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:53:33,472 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:53:33,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:33,472 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:33,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 21 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:53:33,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2022-02-15 01:53:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-02-15 01:53:33,500 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 34 [2022-02-15 01:53:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:33,500 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-02-15 01:53:33,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-02-15 01:53:33,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:33,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:33,501 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:33,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 01:53:33,501 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:33,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1034932548, now seen corresponding path program 59 times [2022-02-15 01:53:33,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:33,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715094184] [2022-02-15 01:53:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:33,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:33,502 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:33,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:33,503 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:33,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:33,621 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:33,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715094184] [2022-02-15 01:53:33,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1715094184] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:33,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:33,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:33,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769277945] [2022-02-15 01:53:33,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:33,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:33,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:33,622 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:33,858 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-15 01:53:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:33,859 INFO L225 Difference]: With dead ends: 110 [2022-02-15 01:53:33,859 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 01:53:33,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:33,859 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:33,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 01:53:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2022-02-15 01:53:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-02-15 01:53:33,887 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 34 [2022-02-15 01:53:33,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:33,887 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-02-15 01:53:33,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:33,887 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-02-15 01:53:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:33,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:33,888 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:33,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 01:53:33,888 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:33,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1343416772, now seen corresponding path program 60 times [2022-02-15 01:53:33,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:33,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720949018] [2022-02-15 01:53:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:33,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:33,889 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:33,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:33,890 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:33,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:33,983 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:33,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720949018] [2022-02-15 01:53:33,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720949018] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:33,983 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:33,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:33,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317687951] [2022-02-15 01:53:33,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:33,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:33,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:33,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:33,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:33,984 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:34,225 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-15 01:53:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:34,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:34,225 INFO L225 Difference]: With dead ends: 116 [2022-02-15 01:53:34,226 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:53:34,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:34,226 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:34,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:53:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2022-02-15 01:53:34,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-02-15 01:53:34,255 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 34 [2022-02-15 01:53:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:34,255 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-02-15 01:53:34,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-02-15 01:53:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:34,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:34,256 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:34,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 01:53:34,256 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1444012612, now seen corresponding path program 61 times [2022-02-15 01:53:34,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:34,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737132652] [2022-02-15 01:53:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:34,258 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:34,258 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:34,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:34,258 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:34,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:34,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:34,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737132652] [2022-02-15 01:53:34,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1737132652] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:34,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:34,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:34,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475248686] [2022-02-15 01:53:34,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:34,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:34,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:34,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:34,362 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:34,598 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-15 01:53:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:34,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:34,599 INFO L225 Difference]: With dead ends: 122 [2022-02-15 01:53:34,599 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 01:53:34,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:34,600 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:34,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 01:53:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2022-02-15 01:53:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-02-15 01:53:34,629 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 34 [2022-02-15 01:53:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:34,629 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-02-15 01:53:34,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-02-15 01:53:34,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:34,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:34,630 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:34,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 01:53:34,630 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash 667632956, now seen corresponding path program 62 times [2022-02-15 01:53:34,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:34,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127181731] [2022-02-15 01:53:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:34,632 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:34,632 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:34,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:34,632 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:34,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:34,722 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:34,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127181731] [2022-02-15 01:53:34,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1127181731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:34,722 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:34,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:34,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427119202] [2022-02-15 01:53:34,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:34,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:34,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:34,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:34,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:34,723 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:34,988 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-15 01:53:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:34,989 INFO L225 Difference]: With dead ends: 128 [2022-02-15 01:53:34,989 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:53:34,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:34,990 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:34,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 15 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:53:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2022-02-15 01:53:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2022-02-15 01:53:35,021 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 34 [2022-02-15 01:53:35,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:35,021 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2022-02-15 01:53:35,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2022-02-15 01:53:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:35,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:35,021 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:35,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 01:53:35,022 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:35,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1560507204, now seen corresponding path program 63 times [2022-02-15 01:53:35,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:35,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813223064] [2022-02-15 01:53:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:35,023 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:35,023 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:35,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:35,024 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:35,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:35,126 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:35,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813223064] [2022-02-15 01:53:35,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1813223064] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:35,127 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:35,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:35,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511103173] [2022-02-15 01:53:35,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:35,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:35,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:35,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:35,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:35,128 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:35,388 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-15 01:53:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:35,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:35,389 INFO L225 Difference]: With dead ends: 134 [2022-02-15 01:53:35,389 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:53:35,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:35,390 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:35,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 21 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:53:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2022-02-15 01:53:35,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-02-15 01:53:35,421 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 34 [2022-02-15 01:53:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:35,421 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-02-15 01:53:35,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-02-15 01:53:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:35,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:35,422 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:35,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 01:53:35,422 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:35,422 INFO L85 PathProgramCache]: Analyzing trace with hash 385479740, now seen corresponding path program 64 times [2022-02-15 01:53:35,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:35,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631790837] [2022-02-15 01:53:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:35,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:35,423 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:35,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:35,424 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:35,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:35,544 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:35,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631790837] [2022-02-15 01:53:35,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1631790837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:35,545 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:35,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:35,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946488104] [2022-02-15 01:53:35,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:35,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:35,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:35,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:35,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:35,547 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:35,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:35,786 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-15 01:53:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:35,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:35,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:35,787 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:53:35,787 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:53:35,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:35,788 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:35,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:53:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 97. [2022-02-15 01:53:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-02-15 01:53:35,820 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 34 [2022-02-15 01:53:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:35,820 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-02-15 01:53:35,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-02-15 01:53:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:53:35,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:35,821 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:35,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 01:53:35,821 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2126808132, now seen corresponding path program 65 times [2022-02-15 01:53:35,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:35,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946852182] [2022-02-15 01:53:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:35,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:35,822 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:35,823 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:35,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:35,914 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:35,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946852182] [2022-02-15 01:53:35,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946852182] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:35,914 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:35,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:53:35,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303527592] [2022-02-15 01:53:35,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:35,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:53:35,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:53:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:53:35,915 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:36,183 INFO L93 Difference]: Finished difference Result 124 states and 176 transitions. [2022-02-15 01:53:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:53:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:53:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:36,184 INFO L225 Difference]: With dead ends: 124 [2022-02-15 01:53:36,184 INFO L226 Difference]: Without dead ends: 118 [2022-02-15 01:53:36,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:53:36,185 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:36,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:36,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-15 01:53:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2022-02-15 01:53:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2022-02-15 01:53:36,210 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 34 [2022-02-15 01:53:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:36,211 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2022-02-15 01:53:36,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2022-02-15 01:53:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:36,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:36,211 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:36,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 01:53:36,211 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:36,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1574474527, now seen corresponding path program 66 times [2022-02-15 01:53:36,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:36,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636605360] [2022-02-15 01:53:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:36,213 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:36,213 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:36,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:36,213 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:36,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:36,336 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:36,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636605360] [2022-02-15 01:53:36,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [636605360] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:36,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:36,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:36,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482077103] [2022-02-15 01:53:36,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:36,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:36,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:36,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:36,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:36,337 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:36,590 INFO L93 Difference]: Finished difference Result 94 states and 132 transitions. [2022-02-15 01:53:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:36,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:36,590 INFO L225 Difference]: With dead ends: 94 [2022-02-15 01:53:36,591 INFO L226 Difference]: Without dead ends: 88 [2022-02-15 01:53:36,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:36,591 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:36,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 21 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:36,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-15 01:53:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-02-15 01:53:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-02-15 01:53:36,618 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 36 [2022-02-15 01:53:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:36,618 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-02-15 01:53:36,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-02-15 01:53:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:36,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:36,619 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:36,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 01:53:36,619 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:36,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash 479525535, now seen corresponding path program 67 times [2022-02-15 01:53:36,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:36,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341234345] [2022-02-15 01:53:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:36,620 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:36,620 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:36,621 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:36,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:36,722 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:36,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341234345] [2022-02-15 01:53:36,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [341234345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:36,723 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:36,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:36,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766215160] [2022-02-15 01:53:36,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:36,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:36,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:36,723 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:36,973 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-15 01:53:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:36,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:36,974 INFO L225 Difference]: With dead ends: 98 [2022-02-15 01:53:36,974 INFO L226 Difference]: Without dead ends: 92 [2022-02-15 01:53:36,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:36,975 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:36,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:36,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-15 01:53:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-02-15 01:53:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-02-15 01:53:37,007 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 36 [2022-02-15 01:53:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:37,008 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-02-15 01:53:37,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-02-15 01:53:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:37,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:37,008 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:37,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 01:53:37,008 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash 500531743, now seen corresponding path program 68 times [2022-02-15 01:53:37,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:37,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082875177] [2022-02-15 01:53:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:37,010 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:37,010 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:37,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:37,011 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:37,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:37,111 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:37,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082875177] [2022-02-15 01:53:37,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2082875177] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:37,112 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:37,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:37,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473275856] [2022-02-15 01:53:37,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:37,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:37,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:37,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:37,112 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:37,386 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-15 01:53:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:37,386 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:37,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:37,387 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:53:37,387 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:53:37,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:37,387 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:37,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 19 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:53:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-02-15 01:53:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-02-15 01:53:37,418 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 36 [2022-02-15 01:53:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:37,418 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-02-15 01:53:37,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-02-15 01:53:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:37,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:37,419 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:37,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 01:53:37,419 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:37,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash -787338849, now seen corresponding path program 69 times [2022-02-15 01:53:37,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:37,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670254478] [2022-02-15 01:53:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:37,420 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:37,420 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:37,421 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:37,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:37,534 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:37,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670254478] [2022-02-15 01:53:37,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670254478] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:37,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:37,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:37,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411634433] [2022-02-15 01:53:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:37,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:37,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:37,535 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:37,793 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-15 01:53:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:37,797 INFO L225 Difference]: With dead ends: 110 [2022-02-15 01:53:37,797 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 01:53:37,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:37,797 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:37,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 23 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 01:53:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2022-02-15 01:53:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-02-15 01:53:37,829 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 36 [2022-02-15 01:53:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:37,829 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-02-15 01:53:37,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-02-15 01:53:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:37,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:37,830 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:37,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 01:53:37,830 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:37,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1480396513, now seen corresponding path program 70 times [2022-02-15 01:53:37,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:37,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776694593] [2022-02-15 01:53:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:37,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:37,831 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:37,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:37,832 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:37,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:37,942 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:37,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776694593] [2022-02-15 01:53:37,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1776694593] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:37,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:37,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:37,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072640798] [2022-02-15 01:53:37,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:37,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:37,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:37,943 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:38,236 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-15 01:53:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:38,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:38,237 INFO L225 Difference]: With dead ends: 116 [2022-02-15 01:53:38,237 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:53:38,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:38,237 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:38,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:38,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:53:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-02-15 01:53:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2022-02-15 01:53:38,271 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 36 [2022-02-15 01:53:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:38,271 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2022-02-15 01:53:38,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2022-02-15 01:53:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:38,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:38,271 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:38,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 01:53:38,271 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:38,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1788880737, now seen corresponding path program 71 times [2022-02-15 01:53:38,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:38,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887587449] [2022-02-15 01:53:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:38,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:38,273 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:38,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:38,274 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:38,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:38,382 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:38,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887587449] [2022-02-15 01:53:38,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1887587449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:38,382 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:38,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:38,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532944001] [2022-02-15 01:53:38,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:38,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:38,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:38,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:38,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:38,383 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:38,658 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-15 01:53:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:38,659 INFO L225 Difference]: With dead ends: 122 [2022-02-15 01:53:38,659 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 01:53:38,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:38,660 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:38,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 01:53:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2022-02-15 01:53:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-02-15 01:53:38,694 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 36 [2022-02-15 01:53:38,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:38,695 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-02-15 01:53:38,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-02-15 01:53:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:38,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:38,695 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:38,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 01:53:38,695 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:38,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:38,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1889476577, now seen corresponding path program 72 times [2022-02-15 01:53:38,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:38,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979142959] [2022-02-15 01:53:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:38,697 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:38,697 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:38,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:38,697 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:38,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:38,806 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:38,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979142959] [2022-02-15 01:53:38,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1979142959] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:38,806 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:38,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:38,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624822213] [2022-02-15 01:53:38,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:38,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:38,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:38,807 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:39,076 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-15 01:53:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:39,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:39,076 INFO L225 Difference]: With dead ends: 128 [2022-02-15 01:53:39,076 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:53:39,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:39,077 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:39,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 23 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:53:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2022-02-15 01:53:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-02-15 01:53:39,117 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 36 [2022-02-15 01:53:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:39,117 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-02-15 01:53:39,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-02-15 01:53:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:39,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:39,117 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:39,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 01:53:39,117 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:39,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:39,118 INFO L85 PathProgramCache]: Analyzing trace with hash 222168991, now seen corresponding path program 73 times [2022-02-15 01:53:39,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:39,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145908127] [2022-02-15 01:53:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:39,119 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:39,119 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:39,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:39,120 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:39,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:39,229 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:39,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145908127] [2022-02-15 01:53:39,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2145908127] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:39,229 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:39,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:39,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612223027] [2022-02-15 01:53:39,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:39,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:39,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:39,230 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:39,487 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-15 01:53:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:39,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:39,488 INFO L225 Difference]: With dead ends: 134 [2022-02-15 01:53:39,488 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:53:39,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:39,488 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:39,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:53:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2022-02-15 01:53:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-02-15 01:53:39,525 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 36 [2022-02-15 01:53:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:39,525 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-02-15 01:53:39,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-02-15 01:53:39,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:39,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:39,525 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:39,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 01:53:39,526 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:39,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2005971169, now seen corresponding path program 74 times [2022-02-15 01:53:39,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:39,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43727638] [2022-02-15 01:53:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:39,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:39,527 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:39,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:39,528 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:39,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:39,630 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:39,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43727638] [2022-02-15 01:53:39,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [43727638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:39,630 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:39,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:39,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028638477] [2022-02-15 01:53:39,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:39,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:39,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:39,631 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:39,895 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-15 01:53:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:39,896 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:39,896 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:53:39,896 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:53:39,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:39,897 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:39,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 17 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:53:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2022-02-15 01:53:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-02-15 01:53:39,934 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 36 [2022-02-15 01:53:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:39,934 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-02-15 01:53:39,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-02-15 01:53:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:39,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:39,935 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:39,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 01:53:39,935 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:39,935 INFO L85 PathProgramCache]: Analyzing trace with hash -59984225, now seen corresponding path program 75 times [2022-02-15 01:53:39,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:39,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070404201] [2022-02-15 01:53:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:39,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:39,937 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:39,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:39,937 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:40,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:40,058 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:40,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070404201] [2022-02-15 01:53:40,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1070404201] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:40,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:40,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:40,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620500162] [2022-02-15 01:53:40,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:40,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:40,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:40,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:40,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:40,059 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:40,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:40,337 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-15 01:53:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:40,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:40,338 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:53:40,338 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:53:40,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:40,339 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:40,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 25 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:53:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2022-02-15 01:53:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-02-15 01:53:40,379 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 36 [2022-02-15 01:53:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:40,379 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-02-15 01:53:40,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-02-15 01:53:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:40,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:40,380 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:40,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 01:53:40,380 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1722695199, now seen corresponding path program 76 times [2022-02-15 01:53:40,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:40,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014660756] [2022-02-15 01:53:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:40,381 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:40,381 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:40,382 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:40,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:40,500 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:40,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014660756] [2022-02-15 01:53:40,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2014660756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:40,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:40,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:40,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383132121] [2022-02-15 01:53:40,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:40,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:40,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:40,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:40,501 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:40,772 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-15 01:53:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:40,773 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:53:40,773 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:53:40,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:40,774 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:40,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:53:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2022-02-15 01:53:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:40,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-02-15 01:53:40,813 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 36 [2022-02-15 01:53:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:40,813 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-02-15 01:53:40,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-02-15 01:53:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:53:40,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:40,814 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:40,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 01:53:40,814 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:40,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1185670559, now seen corresponding path program 77 times [2022-02-15 01:53:40,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:40,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65964895] [2022-02-15 01:53:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:40,815 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:40,815 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:40,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:40,816 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:40,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:40,916 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:40,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65964895] [2022-02-15 01:53:40,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [65964895] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:40,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:40,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:53:40,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24128632] [2022-02-15 01:53:40,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:40,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:53:40,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:40,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:53:40,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:53:40,917 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:41,180 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-15 01:53:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:53:41,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:53:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:41,180 INFO L225 Difference]: With dead ends: 134 [2022-02-15 01:53:41,181 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:53:41,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:53:41,181 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:41,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 19 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:53:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 85. [2022-02-15 01:53:41,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-02-15 01:53:41,212 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 36 [2022-02-15 01:53:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:41,212 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-02-15 01:53:41,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-02-15 01:53:41,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:41,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:41,212 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:41,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 01:53:41,212 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1314633534, now seen corresponding path program 78 times [2022-02-15 01:53:41,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:41,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831569576] [2022-02-15 01:53:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:41,214 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:41,214 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:41,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:41,214 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:41,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:41,332 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:41,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831569576] [2022-02-15 01:53:41,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [831569576] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:41,332 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:41,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:41,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685244428] [2022-02-15 01:53:41,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:41,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:41,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:41,333 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:41,617 INFO L93 Difference]: Finished difference Result 100 states and 141 transitions. [2022-02-15 01:53:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:41,617 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:41,617 INFO L225 Difference]: With dead ends: 100 [2022-02-15 01:53:41,617 INFO L226 Difference]: Without dead ends: 94 [2022-02-15 01:53:41,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:41,619 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:41,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 23 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-15 01:53:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-02-15 01:53:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2022-02-15 01:53:41,652 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 38 [2022-02-15 01:53:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:41,652 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2022-02-15 01:53:41,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2022-02-15 01:53:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:41,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:41,652 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:41,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 01:53:41,652 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1885384770, now seen corresponding path program 79 times [2022-02-15 01:53:41,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:41,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879100018] [2022-02-15 01:53:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:41,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:41,654 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:41,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:41,655 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:41,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:41,791 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:41,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879100018] [2022-02-15 01:53:41,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [879100018] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:41,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:41,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:41,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873930895] [2022-02-15 01:53:41,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:41,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:41,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:41,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:41,792 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:42,068 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-15 01:53:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:42,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:42,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:42,069 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:53:42,069 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:53:42,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:42,070 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:42,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 21 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:53:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-02-15 01:53:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2022-02-15 01:53:42,105 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 38 [2022-02-15 01:53:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:42,105 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2022-02-15 01:53:42,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2022-02-15 01:53:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:42,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:42,105 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:42,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 01:53:42,106 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1906390978, now seen corresponding path program 80 times [2022-02-15 01:53:42,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:42,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977986309] [2022-02-15 01:53:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:42,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:42,107 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:42,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:42,108 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:42,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:42,224 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:42,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977986309] [2022-02-15 01:53:42,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [977986309] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:42,224 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:42,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:42,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65038165] [2022-02-15 01:53:42,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:42,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:42,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:42,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:42,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:42,225 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:42,503 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-15 01:53:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:42,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:42,504 INFO L225 Difference]: With dead ends: 110 [2022-02-15 01:53:42,504 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 01:53:42,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:42,505 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:42,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 01:53:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2022-02-15 01:53:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-02-15 01:53:42,541 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 38 [2022-02-15 01:53:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:42,541 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-02-15 01:53:42,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-02-15 01:53:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:42,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:42,542 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:42,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 01:53:42,542 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:42,542 INFO L85 PathProgramCache]: Analyzing trace with hash 618520386, now seen corresponding path program 81 times [2022-02-15 01:53:42,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:42,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932937294] [2022-02-15 01:53:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:42,543 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:42,543 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:42,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:42,544 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:42,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:42,682 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:42,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932937294] [2022-02-15 01:53:42,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [932937294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:42,683 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:42,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:42,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435974756] [2022-02-15 01:53:42,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:42,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:42,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:42,683 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:42,969 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-15 01:53:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:42,969 INFO L225 Difference]: With dead ends: 116 [2022-02-15 01:53:42,969 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:53:42,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:42,970 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:42,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 23 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:53:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2022-02-15 01:53:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-02-15 01:53:43,008 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 38 [2022-02-15 01:53:43,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:43,008 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-02-15 01:53:43,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-02-15 01:53:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:43,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:43,008 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:43,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 01:53:43,009 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash -74537278, now seen corresponding path program 82 times [2022-02-15 01:53:43,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:43,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527465991] [2022-02-15 01:53:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:43,010 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:43,010 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:43,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:43,011 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:43,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:43,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:43,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527465991] [2022-02-15 01:53:43,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [527465991] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:43,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:43,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:43,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100344364] [2022-02-15 01:53:43,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:43,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:43,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:43,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:43,132 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:43,461 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-15 01:53:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:43,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:43,461 INFO L225 Difference]: With dead ends: 122 [2022-02-15 01:53:43,462 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 01:53:43,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:43,462 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:43,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 19 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 01:53:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2022-02-15 01:53:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-02-15 01:53:43,505 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 38 [2022-02-15 01:53:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:43,505 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-02-15 01:53:43,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-02-15 01:53:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:43,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:43,506 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:43,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 01:53:43,506 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:43,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash -383021502, now seen corresponding path program 83 times [2022-02-15 01:53:43,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:43,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557480643] [2022-02-15 01:53:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:43,507 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:43,507 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:43,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:43,508 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:43,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:43,627 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:43,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557480643] [2022-02-15 01:53:43,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [557480643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:43,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:43,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:43,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998666441] [2022-02-15 01:53:43,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:43,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:43,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:43,628 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:43,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:43,919 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-15 01:53:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:43,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:43,920 INFO L225 Difference]: With dead ends: 128 [2022-02-15 01:53:43,920 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:53:43,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:43,922 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:43,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 19 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:53:43,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2022-02-15 01:53:43,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-02-15 01:53:43,965 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 38 [2022-02-15 01:53:43,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:43,965 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-02-15 01:53:43,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-02-15 01:53:43,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:43,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:43,966 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:43,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 01:53:43,966 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash -483617342, now seen corresponding path program 84 times [2022-02-15 01:53:43,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:43,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192861850] [2022-02-15 01:53:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:43,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:43,967 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:43,968 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:44,109 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:44,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192861850] [2022-02-15 01:53:44,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [192861850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:44,110 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:44,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:44,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299283251] [2022-02-15 01:53:44,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:44,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:44,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:44,110 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:44,403 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-15 01:53:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:44,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:44,404 INFO L225 Difference]: With dead ends: 134 [2022-02-15 01:53:44,404 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:53:44,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:44,405 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:44,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:53:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 103. [2022-02-15 01:53:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-02-15 01:53:44,449 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 38 [2022-02-15 01:53:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:44,449 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-02-15 01:53:44,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-02-15 01:53:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:44,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:44,449 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:44,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 01:53:44,450 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1628028226, now seen corresponding path program 85 times [2022-02-15 01:53:44,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:44,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988393830] [2022-02-15 01:53:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:44,451 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:44,451 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:44,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:44,452 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:44,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:44,568 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:44,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988393830] [2022-02-15 01:53:44,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988393830] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:44,569 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:44,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:44,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373631417] [2022-02-15 01:53:44,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:44,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:44,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:44,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:44,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:44,569 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:44,870 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-15 01:53:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:44,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:44,871 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:53:44,871 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:53:44,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:44,872 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:44,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:53:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 105. [2022-02-15 01:53:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-02-15 01:53:44,918 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 38 [2022-02-15 01:53:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:44,919 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-02-15 01:53:44,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-02-15 01:53:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:44,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:44,919 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:44,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 01:53:44,919 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash -600111934, now seen corresponding path program 86 times [2022-02-15 01:53:44,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:44,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095855759] [2022-02-15 01:53:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:44,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:44,921 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:44,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:44,921 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:45,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:45,050 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:45,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095855759] [2022-02-15 01:53:45,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095855759] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:45,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:45,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:45,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089461492] [2022-02-15 01:53:45,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:45,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:45,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:45,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:45,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:45,051 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:45,347 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-15 01:53:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:45,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:45,348 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:53:45,348 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:53:45,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:45,348 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:45,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:53:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2022-02-15 01:53:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-02-15 01:53:45,393 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 38 [2022-02-15 01:53:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:45,393 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-02-15 01:53:45,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-02-15 01:53:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:45,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:45,394 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:45,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 01:53:45,394 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:45,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1345875010, now seen corresponding path program 87 times [2022-02-15 01:53:45,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:45,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974202353] [2022-02-15 01:53:45,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:45,396 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:45,396 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:45,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:45,396 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:45,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:45,512 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:45,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974202353] [2022-02-15 01:53:45,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974202353] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:45,512 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:45,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:45,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47489923] [2022-02-15 01:53:45,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:45,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:45,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:45,513 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:45,815 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-15 01:53:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:45,816 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:53:45,816 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:53:45,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:45,816 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:45,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:53:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 109. [2022-02-15 01:53:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-02-15 01:53:45,862 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 38 [2022-02-15 01:53:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:45,862 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-02-15 01:53:45,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:45,862 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-02-15 01:53:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:45,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:45,863 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:45,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 01:53:45,863 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:45,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:45,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1166412862, now seen corresponding path program 88 times [2022-02-15 01:53:45,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:45,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831988305] [2022-02-15 01:53:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:45,864 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:45,865 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:45,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:45,865 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:45,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:45,976 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:45,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831988305] [2022-02-15 01:53:45,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [831988305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:45,976 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:45,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:45,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270892057] [2022-02-15 01:53:45,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:45,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:45,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:45,977 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:46,318 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-15 01:53:46,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:46,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:46,320 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:53:46,320 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:53:46,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:46,320 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:46,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 27 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:46,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:53:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2022-02-15 01:53:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-02-15 01:53:46,367 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 38 [2022-02-15 01:53:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:46,368 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-02-15 01:53:46,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-02-15 01:53:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:46,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:46,368 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:46,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 01:53:46,368 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1703437502, now seen corresponding path program 89 times [2022-02-15 01:53:46,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:46,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682677684] [2022-02-15 01:53:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:46,370 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:46,370 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:46,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:46,370 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:46,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:46,499 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:46,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682677684] [2022-02-15 01:53:46,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1682677684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:46,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:46,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:46,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099517211] [2022-02-15 01:53:46,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:46,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:46,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:46,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:46,500 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:46,809 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:53:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:46,810 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:53:46,811 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:53:46,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:46,811 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:46,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:53:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2022-02-15 01:53:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-02-15 01:53:46,865 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 38 [2022-02-15 01:53:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:46,865 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-02-15 01:53:46,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-02-15 01:53:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:53:46,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:46,866 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:46,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 01:53:46,866 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:46,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1906926274, now seen corresponding path program 90 times [2022-02-15 01:53:46,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:46,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136745541] [2022-02-15 01:53:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:46,868 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:46,868 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:46,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:46,868 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:46,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:46,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:46,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136745541] [2022-02-15 01:53:46,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136745541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:46,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:46,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:53:46,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690346455] [2022-02-15 01:53:46,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:46,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:53:46,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:53:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:53:46,982 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:47,280 INFO L93 Difference]: Finished difference Result 144 states and 206 transitions. [2022-02-15 01:53:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:53:47,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:53:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:47,281 INFO L225 Difference]: With dead ends: 144 [2022-02-15 01:53:47,281 INFO L226 Difference]: Without dead ends: 138 [2022-02-15 01:53:47,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:53:47,281 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:47,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-15 01:53:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2022-02-15 01:53:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-02-15 01:53:47,318 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 38 [2022-02-15 01:53:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:47,318 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-02-15 01:53:47,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-02-15 01:53:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:47,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:47,319 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:47,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 01:53:47,319 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:47,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1096360357, now seen corresponding path program 91 times [2022-02-15 01:53:47,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:47,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552102228] [2022-02-15 01:53:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:47,320 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:47,320 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:47,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:47,321 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:47,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:47,457 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:47,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552102228] [2022-02-15 01:53:47,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552102228] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:47,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:47,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:47,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494181146] [2022-02-15 01:53:47,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:47,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:47,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:47,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:47,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:47,458 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:47,769 INFO L93 Difference]: Finished difference Result 106 states and 150 transitions. [2022-02-15 01:53:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:47,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:47,770 INFO L225 Difference]: With dead ends: 106 [2022-02-15 01:53:47,770 INFO L226 Difference]: Without dead ends: 100 [2022-02-15 01:53:47,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:47,770 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:47,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 21 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-15 01:53:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-02-15 01:53:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-02-15 01:53:47,808 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 40 [2022-02-15 01:53:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:47,808 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-02-15 01:53:47,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-02-15 01:53:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:47,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:47,809 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:47,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 01:53:47,809 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1411365, now seen corresponding path program 92 times [2022-02-15 01:53:47,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:47,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682479579] [2022-02-15 01:53:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:47,810 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:47,810 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:47,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:47,811 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:47,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:47,940 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:47,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682479579] [2022-02-15 01:53:47,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [682479579] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:47,941 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:47,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:47,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869449721] [2022-02-15 01:53:47,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:47,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:47,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:47,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:47,941 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:48,240 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2022-02-15 01:53:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:48,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:48,241 INFO L225 Difference]: With dead ends: 110 [2022-02-15 01:53:48,241 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 01:53:48,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:48,241 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:48,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 01:53:48,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-02-15 01:53:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-02-15 01:53:48,290 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 40 [2022-02-15 01:53:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:48,290 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-02-15 01:53:48,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-02-15 01:53:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:48,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:48,290 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:48,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 01:53:48,290 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:48,291 INFO L85 PathProgramCache]: Analyzing trace with hash 22417573, now seen corresponding path program 93 times [2022-02-15 01:53:48,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:48,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484298118] [2022-02-15 01:53:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:48,292 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:48,292 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:48,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:48,293 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:48,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:48,434 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:48,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484298118] [2022-02-15 01:53:48,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [484298118] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:48,435 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:48,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:48,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974151857] [2022-02-15 01:53:48,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:48,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:48,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:48,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:48,435 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:48,743 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-15 01:53:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:48,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:48,743 INFO L225 Difference]: With dead ends: 116 [2022-02-15 01:53:48,743 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:53:48,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:48,744 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:48,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:53:48,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2022-02-15 01:53:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-02-15 01:53:48,787 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 40 [2022-02-15 01:53:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:48,788 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-02-15 01:53:48,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-02-15 01:53:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:48,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:48,788 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:48,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-15 01:53:48,788 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1265453019, now seen corresponding path program 94 times [2022-02-15 01:53:48,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:48,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228118285] [2022-02-15 01:53:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:48,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:48,790 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:48,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:48,790 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:48,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:48,931 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:48,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228118285] [2022-02-15 01:53:48,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1228118285] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:48,931 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:48,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:48,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362182605] [2022-02-15 01:53:48,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:48,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:48,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:48,932 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:49,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:49,242 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-15 01:53:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:49,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:49,243 INFO L225 Difference]: With dead ends: 122 [2022-02-15 01:53:49,243 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 01:53:49,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:49,244 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:49,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 01:53:49,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2022-02-15 01:53:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-02-15 01:53:49,295 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 40 [2022-02-15 01:53:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:49,296 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-02-15 01:53:49,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-02-15 01:53:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:49,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:49,296 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:49,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-15 01:53:49,296 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1958510683, now seen corresponding path program 95 times [2022-02-15 01:53:49,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:49,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304645733] [2022-02-15 01:53:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:49,298 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:49,298 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:49,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:49,298 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:49,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:49,433 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:49,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304645733] [2022-02-15 01:53:49,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [304645733] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:49,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:49,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:49,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848649116] [2022-02-15 01:53:49,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:49,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:49,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:49,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:49,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:49,434 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:49,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:49,787 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-15 01:53:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:49,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:49,788 INFO L225 Difference]: With dead ends: 128 [2022-02-15 01:53:49,788 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:53:49,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:49,789 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:49,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:53:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2022-02-15 01:53:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-02-15 01:53:49,842 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 40 [2022-02-15 01:53:49,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:49,843 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-02-15 01:53:49,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-02-15 01:53:49,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:49,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:49,843 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:49,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-15 01:53:49,843 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2027972389, now seen corresponding path program 96 times [2022-02-15 01:53:49,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:49,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072661763] [2022-02-15 01:53:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:49,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:49,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:49,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:49,846 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:49,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:49,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:49,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072661763] [2022-02-15 01:53:49,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1072661763] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:49,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:49,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:49,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51594861] [2022-02-15 01:53:49,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:49,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:49,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:49,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:49,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:49,979 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:50,299 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-15 01:53:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:50,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:50,300 INFO L225 Difference]: With dead ends: 134 [2022-02-15 01:53:50,300 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:53:50,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:50,300 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:50,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:53:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 107. [2022-02-15 01:53:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-02-15 01:53:50,356 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 40 [2022-02-15 01:53:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:50,356 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-02-15 01:53:50,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-02-15 01:53:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:50,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:50,356 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:50,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-15 01:53:50,356 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1927376549, now seen corresponding path program 97 times [2022-02-15 01:53:50,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:50,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050493946] [2022-02-15 01:53:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:50,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:50,358 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:50,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:50,359 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:50,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:50,488 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:50,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050493946] [2022-02-15 01:53:50,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1050493946] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:50,488 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:50,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:50,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422816109] [2022-02-15 01:53:50,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:50,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:50,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:50,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:50,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:50,489 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:50,812 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-15 01:53:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:50,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:50,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:50,813 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:53:50,813 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:53:50,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:50,813 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:50,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:50,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:53:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 109. [2022-02-15 01:53:50,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-02-15 01:53:50,863 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 40 [2022-02-15 01:53:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:50,863 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-02-15 01:53:50,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-02-15 01:53:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:50,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:50,864 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:50,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-15 01:53:50,864 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash -255945179, now seen corresponding path program 98 times [2022-02-15 01:53:50,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:50,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238022424] [2022-02-15 01:53:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:50,866 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:50,866 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:50,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:50,867 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:50,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:50,992 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:50,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238022424] [2022-02-15 01:53:50,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238022424] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:50,992 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:50,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:50,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367167069] [2022-02-15 01:53:50,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:50,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:50,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:50,993 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:51,325 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-15 01:53:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:51,326 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:53:51,326 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:53:51,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:51,326 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:51,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:51,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:53:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 111. [2022-02-15 01:53:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-02-15 01:53:51,379 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 40 [2022-02-15 01:53:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:51,379 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-02-15 01:53:51,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-02-15 01:53:51,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:51,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:51,380 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:51,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-15 01:53:51,380 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:51,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:51,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1810881957, now seen corresponding path program 99 times [2022-02-15 01:53:51,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:51,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880416443] [2022-02-15 01:53:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:51,381 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:51,381 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:51,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:51,382 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:51,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:51,519 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:51,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880416443] [2022-02-15 01:53:51,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [880416443] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:51,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:51,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:51,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004266405] [2022-02-15 01:53:51,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:51,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:51,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:51,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:51,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:51,520 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:51,843 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-15 01:53:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:51,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:51,844 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:53:51,844 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:53:51,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:51,844 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:51,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:53:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2022-02-15 01:53:51,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-02-15 01:53:51,897 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 40 [2022-02-15 01:53:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:51,897 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-02-15 01:53:51,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-02-15 01:53:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:51,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:51,898 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:51,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-15 01:53:51,898 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:51,898 INFO L85 PathProgramCache]: Analyzing trace with hash -538098395, now seen corresponding path program 100 times [2022-02-15 01:53:51,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:51,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322345423] [2022-02-15 01:53:51,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:51,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:51,900 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:51,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:51,901 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:52,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:52,047 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:52,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322345423] [2022-02-15 01:53:52,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322345423] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:52,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:52,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:52,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817954366] [2022-02-15 01:53:52,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:52,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:52,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:52,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:52,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:52,048 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:52,426 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-15 01:53:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:52,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:52,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:52,427 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:53:52,427 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:53:52,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:52,428 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:52,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 21 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:53:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2022-02-15 01:53:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-02-15 01:53:52,482 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 40 [2022-02-15 01:53:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:52,482 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-02-15 01:53:52,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-02-15 01:53:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:52,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:52,483 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:52,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-15 01:53:52,483 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:52,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1244581029, now seen corresponding path program 101 times [2022-02-15 01:53:52,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:52,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585068530] [2022-02-15 01:53:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:52,484 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:52,484 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:52,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:52,485 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:52,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:52,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:52,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585068530] [2022-02-15 01:53:52,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585068530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:52,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:52,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:52,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674670767] [2022-02-15 01:53:52,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:52,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:52,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:52,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:52,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:52,623 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:52,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:52,954 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:53:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:52,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:52,955 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:53:52,955 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:53:52,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:52,956 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:52,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:53:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2022-02-15 01:53:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-02-15 01:53:53,016 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 40 [2022-02-15 01:53:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:53,017 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-02-15 01:53:53,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-02-15 01:53:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:53,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:53,017 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:53,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-15 01:53:53,017 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash 707556389, now seen corresponding path program 102 times [2022-02-15 01:53:53,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:53,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696071920] [2022-02-15 01:53:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:53,019 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:53,019 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:53,019 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:53,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:53,164 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:53,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696071920] [2022-02-15 01:53:53,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [696071920] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:53,165 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:53,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:53,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399867723] [2022-02-15 01:53:53,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:53,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:53,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:53,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:53,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:53,165 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:53,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:53,497 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:53:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:53,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:53,498 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:53:53,498 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:53:53,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:53,499 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:53,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 15 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:53:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 119. [2022-02-15 01:53:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-02-15 01:53:53,559 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 40 [2022-02-15 01:53:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:53,559 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-02-15 01:53:53,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-02-15 01:53:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:53,560 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:53,560 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:53,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-15 01:53:53,560 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:53,560 INFO L85 PathProgramCache]: Analyzing trace with hash 22952869, now seen corresponding path program 103 times [2022-02-15 01:53:53,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:53,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292725791] [2022-02-15 01:53:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:53,561 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:53,561 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:53,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:53,562 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:53,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:53,687 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:53,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292725791] [2022-02-15 01:53:53,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292725791] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:53,687 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:53,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:53,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271056904] [2022-02-15 01:53:53,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:53,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:53,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:53,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:53,688 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:54,026 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:53:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:54,027 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:53:54,027 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:53:54,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:54,027 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:54,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 25 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:53:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 121. [2022-02-15 01:53:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-02-15 01:53:54,089 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 40 [2022-02-15 01:53:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:54,089 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-02-15 01:53:54,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-02-15 01:53:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:53:54,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:54,090 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:54,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-15 01:53:54,090 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash -751033563, now seen corresponding path program 104 times [2022-02-15 01:53:54,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:54,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359291461] [2022-02-15 01:53:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:54,091 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:54,092 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:54,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:54,092 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:54,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:54,221 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:54,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359291461] [2022-02-15 01:53:54,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1359291461] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:54,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:54,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:53:54,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992580038] [2022-02-15 01:53:54,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:54,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:53:54,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:53:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:53:54,222 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:54,541 INFO L93 Difference]: Finished difference Result 154 states and 221 transitions. [2022-02-15 01:53:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:53:54,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:53:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:54,542 INFO L225 Difference]: With dead ends: 154 [2022-02-15 01:53:54,542 INFO L226 Difference]: Without dead ends: 148 [2022-02-15 01:53:54,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=745, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:53:54,543 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:54,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-15 01:53:54,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 97. [2022-02-15 01:53:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-02-15 01:53:54,586 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 40 [2022-02-15 01:53:54,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:54,586 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-02-15 01:53:54,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-02-15 01:53:54,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:53:54,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:54,587 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:54,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-15 01:53:54,587 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:54,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1220850232, now seen corresponding path program 105 times [2022-02-15 01:53:54,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:54,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300370850] [2022-02-15 01:53:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:54,588 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:54,588 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:54,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:54,589 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:54,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:54,728 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:54,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300370850] [2022-02-15 01:53:54,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [300370850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:54,729 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:54,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:53:54,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958330657] [2022-02-15 01:53:54,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:54,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:53:54,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:54,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:53:54,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:53:54,729 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:55,064 INFO L93 Difference]: Finished difference Result 112 states and 159 transitions. [2022-02-15 01:53:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:53:55,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:53:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:55,064 INFO L225 Difference]: With dead ends: 112 [2022-02-15 01:53:55,065 INFO L226 Difference]: Without dead ends: 106 [2022-02-15 01:53:55,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:53:55,065 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:55,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-15 01:53:55,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-02-15 01:53:55,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2022-02-15 01:53:55,111 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 42 [2022-02-15 01:53:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:55,111 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2022-02-15 01:53:55,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2022-02-15 01:53:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:53:55,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:55,111 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:55,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-15 01:53:55,112 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1979168072, now seen corresponding path program 106 times [2022-02-15 01:53:55,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:55,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60594810] [2022-02-15 01:53:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:55,113 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:55,113 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:55,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:55,114 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:55,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:55,261 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:55,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60594810] [2022-02-15 01:53:55,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [60594810] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:55,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:55,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:53:55,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323697155] [2022-02-15 01:53:55,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:55,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:53:55,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:53:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:53:55,262 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:55,613 INFO L93 Difference]: Finished difference Result 116 states and 164 transitions. [2022-02-15 01:53:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:53:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:53:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:55,614 INFO L225 Difference]: With dead ends: 116 [2022-02-15 01:53:55,614 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:53:55,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:53:55,614 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:55,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 17 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:53:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2022-02-15 01:53:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2022-02-15 01:53:55,664 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 42 [2022-02-15 01:53:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:55,664 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2022-02-15 01:53:55,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2022-02-15 01:53:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:53:55,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:55,668 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:55,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-15 01:53:55,668 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2000174280, now seen corresponding path program 107 times [2022-02-15 01:53:55,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:55,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115571234] [2022-02-15 01:53:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:55,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:55,669 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:55,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:55,670 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:55,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:55,808 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:55,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115571234] [2022-02-15 01:53:55,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115571234] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:55,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:55,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:53:55,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777477503] [2022-02-15 01:53:55,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:55,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:53:55,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:53:55,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:53:55,809 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:56,142 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-15 01:53:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:53:56,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:53:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:56,142 INFO L225 Difference]: With dead ends: 122 [2022-02-15 01:53:56,142 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 01:53:56,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:53:56,143 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:56,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 01:53:56,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2022-02-15 01:53:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-02-15 01:53:56,198 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 42 [2022-02-15 01:53:56,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:56,198 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-02-15 01:53:56,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-02-15 01:53:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:53:56,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:56,199 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:56,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-15 01:53:56,199 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:56,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash 712303688, now seen corresponding path program 108 times [2022-02-15 01:53:56,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:56,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267512361] [2022-02-15 01:53:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:56,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:56,200 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:56,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:56,201 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:56,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:56,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:56,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267512361] [2022-02-15 01:53:56,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267512361] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:56,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:56,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:53:56,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235776775] [2022-02-15 01:53:56,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:56,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:53:56,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:53:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:53:56,344 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:56,689 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-15 01:53:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:53:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:53:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:56,690 INFO L225 Difference]: With dead ends: 128 [2022-02-15 01:53:56,690 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:53:56,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:53:56,691 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:56,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:53:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2022-02-15 01:53:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-02-15 01:53:56,744 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 42 [2022-02-15 01:53:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:56,745 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-02-15 01:53:56,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:56,745 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-02-15 01:53:56,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:53:56,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:56,745 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:56,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-15 01:53:56,745 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:56,745 INFO L85 PathProgramCache]: Analyzing trace with hash 19246024, now seen corresponding path program 109 times [2022-02-15 01:53:56,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:56,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14060870] [2022-02-15 01:53:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:56,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:56,747 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:56,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:56,747 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:56,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:56,894 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:56,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14060870] [2022-02-15 01:53:56,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [14060870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:56,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:56,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:53:56,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444338600] [2022-02-15 01:53:56,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:56,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:53:56,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:53:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:53:56,895 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:57,246 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-15 01:53:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:53:57,246 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:53:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:57,247 INFO L225 Difference]: With dead ends: 134 [2022-02-15 01:53:57,247 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:53:57,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:53:57,247 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:57,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:53:57,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2022-02-15 01:53:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-02-15 01:53:57,302 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 42 [2022-02-15 01:53:57,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:57,302 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-02-15 01:53:57,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-02-15 01:53:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:53:57,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:57,303 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:57,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-15 01:53:57,303 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:57,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:57,303 INFO L85 PathProgramCache]: Analyzing trace with hash -289238200, now seen corresponding path program 110 times [2022-02-15 01:53:57,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:57,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129725704] [2022-02-15 01:53:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:57,304 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:57,304 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:57,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:57,305 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:57,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:57,445 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:57,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129725704] [2022-02-15 01:53:57,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129725704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:57,445 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:57,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:53:57,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284024505] [2022-02-15 01:53:57,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:57,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:53:57,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:53:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:53:57,446 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:57,795 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-15 01:53:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:53:57,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:53:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:57,796 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:53:57,796 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:53:57,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:53:57,796 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:57,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:53:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 113. [2022-02-15 01:53:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-02-15 01:53:57,853 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 42 [2022-02-15 01:53:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:57,853 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-02-15 01:53:57,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-02-15 01:53:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:53:57,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:57,854 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:57,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-15 01:53:57,854 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:57,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:57,854 INFO L85 PathProgramCache]: Analyzing trace with hash -389834040, now seen corresponding path program 111 times [2022-02-15 01:53:57,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:57,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336518007] [2022-02-15 01:53:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:57,855 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:57,855 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:57,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:57,856 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:57,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:57,991 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:57,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336518007] [2022-02-15 01:53:57,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336518007] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:57,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:57,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:53:57,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516438503] [2022-02-15 01:53:57,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:57,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:53:57,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:53:57,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:53:57,992 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:58,366 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-15 01:53:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:53:58,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:53:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:58,367 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:53:58,367 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:53:58,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:53:58,368 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:58,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 27 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:53:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 115. [2022-02-15 01:53:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-02-15 01:53:58,426 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 42 [2022-02-15 01:53:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:58,426 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-02-15 01:53:58,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:58,426 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-02-15 01:53:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:53:58,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:58,427 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:58,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-15 01:53:58,427 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:58,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1721811528, now seen corresponding path program 112 times [2022-02-15 01:53:58,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:58,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871302667] [2022-02-15 01:53:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:58,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:58,428 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:58,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:58,429 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:58,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:58,568 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:58,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871302667] [2022-02-15 01:53:58,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1871302667] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:58,568 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:58,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:53:58,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955115954] [2022-02-15 01:53:58,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:58,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:53:58,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:58,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:53:58,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:53:58,569 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:58,927 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-15 01:53:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:53:58,927 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:53:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:58,927 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:53:58,927 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:53:58,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:53:58,928 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:58,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:53:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 117. [2022-02-15 01:53:58,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-02-15 01:53:58,988 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 42 [2022-02-15 01:53:58,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:58,988 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-02-15 01:53:58,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:58,988 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-02-15 01:53:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:53:58,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:58,989 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:58,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-15 01:53:58,989 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash -506328632, now seen corresponding path program 113 times [2022-02-15 01:53:58,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:58,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016199877] [2022-02-15 01:53:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:58,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:58,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:58,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:58,991 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:59,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:59,125 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:59,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016199877] [2022-02-15 01:53:59,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1016199877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:59,125 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:59,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:53:59,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920445201] [2022-02-15 01:53:59,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:59,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:53:59,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:53:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:53:59,126 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:53:59,488 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-15 01:53:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:53:59,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:53:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:53:59,489 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:53:59,489 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:53:59,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:53:59,489 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:53:59,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:53:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:53:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2022-02-15 01:53:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-02-15 01:53:59,551 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 42 [2022-02-15 01:53:59,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:53:59,551 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-02-15 01:53:59,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:53:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-02-15 01:53:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:53:59,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:53:59,552 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:53:59,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-15 01:53:59,552 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:53:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:53:59,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1439658312, now seen corresponding path program 114 times [2022-02-15 01:53:59,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:53:59,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746416427] [2022-02-15 01:53:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:53:59,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:53:59,553 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:53:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:53:59,554 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:53:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:59,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:53:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:53:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:53:59,708 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:53:59,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746416427] [2022-02-15 01:53:59,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [746416427] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:53:59,708 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:53:59,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:53:59,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973018503] [2022-02-15 01:53:59,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:53:59,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:53:59,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:53:59,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:53:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:53:59,709 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:00,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:00,076 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:54:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:54:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:54:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:00,077 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:54:00,077 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:54:00,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:54:00,077 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:00,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:54:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 121. [2022-02-15 01:54:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-02-15 01:54:00,141 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 42 [2022-02-15 01:54:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:00,141 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-02-15 01:54:00,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-02-15 01:54:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:54:00,141 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:00,141 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:00,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-15 01:54:00,141 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:00,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1072629560, now seen corresponding path program 115 times [2022-02-15 01:54:00,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:00,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876772946] [2022-02-15 01:54:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:00,143 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:00,143 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:00,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:00,143 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:00,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:00,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:00,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876772946] [2022-02-15 01:54:00,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [876772946] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:00,290 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:00,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:54:00,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214780044] [2022-02-15 01:54:00,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:00,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:54:00,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:54:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:54:00,290 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:00,674 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:54:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:54:00,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:54:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:00,674 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:54:00,674 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:54:00,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:54:00,675 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:00,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 17 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:54:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2022-02-15 01:54:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-02-15 01:54:00,740 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 42 [2022-02-15 01:54:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:00,740 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-02-15 01:54:00,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:00,740 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-02-15 01:54:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:54:00,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:00,743 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:00,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-15 01:54:00,743 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:00,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1609654200, now seen corresponding path program 116 times [2022-02-15 01:54:00,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:00,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742824046] [2022-02-15 01:54:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:00,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:00,745 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:00,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:00,745 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:00,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:00,904 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:00,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742824046] [2022-02-15 01:54:00,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [742824046] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:00,904 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:00,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:54:00,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792723173] [2022-02-15 01:54:00,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:00,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:54:00,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:00,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:54:00,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:54:00,905 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:01,283 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:54:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:54:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:54:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:01,284 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:54:01,284 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:54:01,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:54:01,284 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:01,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:54:01,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 125. [2022-02-15 01:54:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-02-15 01:54:01,351 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 42 [2022-02-15 01:54:01,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:01,351 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-02-15 01:54:01,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:01,351 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-02-15 01:54:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:54:01,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:01,352 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:01,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-15 01:54:01,352 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2000709576, now seen corresponding path program 117 times [2022-02-15 01:54:01,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:01,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844933267] [2022-02-15 01:54:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:01,354 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:01,354 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:01,355 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:01,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:01,507 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:01,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844933267] [2022-02-15 01:54:01,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1844933267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:01,507 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:01,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:54:01,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115864100] [2022-02-15 01:54:01,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:01,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:54:01,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:01,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:54:01,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:54:01,508 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:01,888 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:54:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:54:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:54:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:01,888 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:54:01,888 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:54:01,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:54:01,889 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:01,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:54:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2022-02-15 01:54:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-02-15 01:54:01,957 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 42 [2022-02-15 01:54:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:01,957 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-02-15 01:54:01,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-02-15 01:54:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:54:01,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:01,957 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:01,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-15 01:54:01,957 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:01,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1226723144, now seen corresponding path program 118 times [2022-02-15 01:54:01,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:01,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612277930] [2022-02-15 01:54:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:01,959 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:01,959 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:01,959 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:02,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:02,110 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:02,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612277930] [2022-02-15 01:54:02,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1612277930] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:02,110 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:02,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:54:02,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16798132] [2022-02-15 01:54:02,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:02,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:54:02,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:54:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:54:02,111 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:02,496 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:54:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:54:02,496 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:54:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:02,496 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:54:02,496 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:54:02,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:54:02,497 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:02,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:54:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 129. [2022-02-15 01:54:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-02-15 01:54:02,565 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 42 [2022-02-15 01:54:02,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:02,565 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-02-15 01:54:02,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:02,565 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-02-15 01:54:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:54:02,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:02,566 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:02,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-15 01:54:02,566 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash 455104200, now seen corresponding path program 119 times [2022-02-15 01:54:02,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:02,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229244835] [2022-02-15 01:54:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:02,567 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:02,567 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:02,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:02,568 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:02,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:02,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:02,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229244835] [2022-02-15 01:54:02,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229244835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:02,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:02,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:54:02,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020512202] [2022-02-15 01:54:02,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:02,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:54:02,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:02,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:54:02,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:54:02,700 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:03,061 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:54:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:54:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:54:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:03,062 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:54:03,062 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:54:03,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=834, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:54:03,062 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:03,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 19 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:54:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 103. [2022-02-15 01:54:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2022-02-15 01:54:03,114 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 42 [2022-02-15 01:54:03,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:03,114 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2022-02-15 01:54:03,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2022-02-15 01:54:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:03,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:03,114 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:03,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-15 01:54:03,114 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1027800363, now seen corresponding path program 120 times [2022-02-15 01:54:03,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:03,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258839684] [2022-02-15 01:54:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:03,117 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:03,117 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:03,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:03,118 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:03,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:03,277 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:03,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258839684] [2022-02-15 01:54:03,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [258839684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:03,277 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:03,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:03,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861437366] [2022-02-15 01:54:03,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:03,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:03,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:03,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:03,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:03,278 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:03,644 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2022-02-15 01:54:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:03,645 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:03,645 INFO L225 Difference]: With dead ends: 118 [2022-02-15 01:54:03,645 INFO L226 Difference]: Without dead ends: 112 [2022-02-15 01:54:03,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:03,645 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:03,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-15 01:54:03,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-02-15 01:54:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2022-02-15 01:54:03,699 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 44 [2022-02-15 01:54:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:03,699 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2022-02-15 01:54:03,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2022-02-15 01:54:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:03,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:03,700 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:03,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-15 01:54:03,700 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:03,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:03,700 INFO L85 PathProgramCache]: Analyzing trace with hash -67148629, now seen corresponding path program 121 times [2022-02-15 01:54:03,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:03,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284369210] [2022-02-15 01:54:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:03,701 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:03,701 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:03,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:03,702 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:03,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:03,848 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:03,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284369210] [2022-02-15 01:54:03,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [284369210] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:03,848 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:03,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:03,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817456500] [2022-02-15 01:54:03,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:03,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:03,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:03,849 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:04,209 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-02-15 01:54:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:04,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:04,210 INFO L225 Difference]: With dead ends: 122 [2022-02-15 01:54:04,210 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 01:54:04,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:04,210 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:04,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 01:54:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2022-02-15 01:54:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2022-02-15 01:54:04,273 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 44 [2022-02-15 01:54:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:04,273 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2022-02-15 01:54:04,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2022-02-15 01:54:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:04,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:04,274 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:04,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-15 01:54:04,274 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:04,274 INFO L85 PathProgramCache]: Analyzing trace with hash -46142421, now seen corresponding path program 122 times [2022-02-15 01:54:04,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:04,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404204426] [2022-02-15 01:54:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:04,275 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:04,275 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:04,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:04,276 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:04,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:04,436 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:04,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404204426] [2022-02-15 01:54:04,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [404204426] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:04,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:04,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:04,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456726442] [2022-02-15 01:54:04,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:04,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:04,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:04,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:04,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:04,437 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:04,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:04,805 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-15 01:54:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:04,805 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:04,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:04,806 INFO L225 Difference]: With dead ends: 128 [2022-02-15 01:54:04,806 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:54:04,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:04,806 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:04,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:54:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2022-02-15 01:54:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-02-15 01:54:04,869 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 44 [2022-02-15 01:54:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:04,869 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-02-15 01:54:04,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-02-15 01:54:04,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:04,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:04,869 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:04,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-15 01:54:04,870 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1334013013, now seen corresponding path program 123 times [2022-02-15 01:54:04,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:04,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512606834] [2022-02-15 01:54:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:04,871 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:04,871 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:04,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:04,872 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:05,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:05,028 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:05,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512606834] [2022-02-15 01:54:05,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [512606834] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:05,029 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:05,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:05,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884077416] [2022-02-15 01:54:05,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:05,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:05,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:05,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:05,029 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:05,403 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-15 01:54:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:05,403 INFO L225 Difference]: With dead ends: 134 [2022-02-15 01:54:05,404 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:54:05,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:05,404 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:05,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:54:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2022-02-15 01:54:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-02-15 01:54:05,466 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 44 [2022-02-15 01:54:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:05,466 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-02-15 01:54:05,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-02-15 01:54:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:05,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:05,467 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:05,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-15 01:54:05,467 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2027070677, now seen corresponding path program 124 times [2022-02-15 01:54:05,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:05,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460013997] [2022-02-15 01:54:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:05,468 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:05,468 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:05,469 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:05,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:05,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:05,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460013997] [2022-02-15 01:54:05,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [460013997] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:05,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:05,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:05,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059751718] [2022-02-15 01:54:05,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:05,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:05,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:05,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:05,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:05,627 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:05,997 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-15 01:54:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:05,997 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:05,998 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:54:05,998 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:54:05,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:05,998 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:05,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:54:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2022-02-15 01:54:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-02-15 01:54:06,063 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 44 [2022-02-15 01:54:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:06,063 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-02-15 01:54:06,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-02-15 01:54:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:06,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:06,063 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:06,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-15 01:54:06,063 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1959412395, now seen corresponding path program 125 times [2022-02-15 01:54:06,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:06,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976456326] [2022-02-15 01:54:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:06,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:06,065 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:06,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:06,066 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:06,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:06,218 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:06,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976456326] [2022-02-15 01:54:06,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [976456326] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:06,218 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:06,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:06,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156137465] [2022-02-15 01:54:06,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:06,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:06,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:06,219 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:06,604 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-15 01:54:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:06,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:06,604 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:54:06,604 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:54:06,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:06,606 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:06,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 15 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:54:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 119. [2022-02-15 01:54:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-02-15 01:54:06,672 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 44 [2022-02-15 01:54:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:06,672 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-02-15 01:54:06,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-02-15 01:54:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:06,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:06,673 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:06,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-15 01:54:06,673 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1858816555, now seen corresponding path program 126 times [2022-02-15 01:54:06,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:06,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506940907] [2022-02-15 01:54:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:06,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:06,674 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:06,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:06,675 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:06,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:06,831 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:06,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506940907] [2022-02-15 01:54:06,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506940907] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:06,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:06,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:06,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879402498] [2022-02-15 01:54:06,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:06,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:06,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:06,832 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:07,270 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-15 01:54:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:07,272 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:54:07,272 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:54:07,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:07,272 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:07,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 19 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:54:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2022-02-15 01:54:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-02-15 01:54:07,343 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 44 [2022-02-15 01:54:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:07,343 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-02-15 01:54:07,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-02-15 01:54:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:07,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:07,343 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:07,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-15 01:54:07,343 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:07,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:07,344 INFO L85 PathProgramCache]: Analyzing trace with hash -324505173, now seen corresponding path program 127 times [2022-02-15 01:54:07,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:07,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728654720] [2022-02-15 01:54:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:07,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:07,345 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:07,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:07,346 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:07,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:07,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:07,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728654720] [2022-02-15 01:54:07,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [728654720] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:07,493 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:07,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:07,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739331741] [2022-02-15 01:54:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:07,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:07,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:07,494 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:07,893 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-15 01:54:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:07,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:07,894 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:54:07,894 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:54:07,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:07,895 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:07,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:54:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 123. [2022-02-15 01:54:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-02-15 01:54:07,965 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 44 [2022-02-15 01:54:07,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:07,966 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-02-15 01:54:07,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-02-15 01:54:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:07,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:07,966 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:07,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-15 01:54:07,966 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1742321963, now seen corresponding path program 128 times [2022-02-15 01:54:07,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:07,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874185079] [2022-02-15 01:54:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:07,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:07,967 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:07,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:07,968 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:08,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:08,135 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:08,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874185079] [2022-02-15 01:54:08,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [874185079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:08,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:08,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:08,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658460749] [2022-02-15 01:54:08,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:08,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:08,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:08,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:08,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:08,136 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:08,538 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:54:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:08,539 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:08,539 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:54:08,539 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:54:08,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:08,540 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:08,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 25 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:08,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:54:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 125. [2022-02-15 01:54:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-02-15 01:54:08,616 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 44 [2022-02-15 01:54:08,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:08,616 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-02-15 01:54:08,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-02-15 01:54:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:08,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:08,616 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:08,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-15 01:54:08,616 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:08,616 INFO L85 PathProgramCache]: Analyzing trace with hash -606658389, now seen corresponding path program 129 times [2022-02-15 01:54:08,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:08,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460532553] [2022-02-15 01:54:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:08,617 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:08,618 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:08,618 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:08,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:08,764 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:08,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460532553] [2022-02-15 01:54:08,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [460532553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:08,764 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:08,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:08,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477969968] [2022-02-15 01:54:08,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:08,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:08,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:08,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:08,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:08,765 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:09,166 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:54:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:09,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:09,167 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:54:09,167 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:54:09,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:09,168 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:09,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:09,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:54:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 127. [2022-02-15 01:54:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-02-15 01:54:09,244 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 44 [2022-02-15 01:54:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:09,245 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-02-15 01:54:09,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:09,245 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-02-15 01:54:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:09,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:09,245 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:09,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-02-15 01:54:09,245 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1176021035, now seen corresponding path program 130 times [2022-02-15 01:54:09,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:09,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837339615] [2022-02-15 01:54:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:09,246 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:09,246 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:09,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:09,247 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:09,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:09,392 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:09,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837339615] [2022-02-15 01:54:09,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837339615] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:09,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:09,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:09,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651866105] [2022-02-15 01:54:09,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:09,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:09,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:09,393 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:09,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:09,802 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:54:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:09,802 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:09,803 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:54:09,803 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:54:09,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:09,803 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:09,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:54:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 129. [2022-02-15 01:54:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-02-15 01:54:09,879 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 44 [2022-02-15 01:54:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:09,879 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-02-15 01:54:09,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-02-15 01:54:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:09,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:09,880 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:09,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-02-15 01:54:09,880 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:09,880 INFO L85 PathProgramCache]: Analyzing trace with hash 638996395, now seen corresponding path program 131 times [2022-02-15 01:54:09,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:09,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702500957] [2022-02-15 01:54:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:09,881 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:09,881 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:09,882 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:10,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:10,037 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:10,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702500957] [2022-02-15 01:54:10,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702500957] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:10,037 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:10,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:10,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467661446] [2022-02-15 01:54:10,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:10,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:10,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:10,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:10,038 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:10,448 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:54:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:10,448 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:10,449 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:54:10,449 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:54:10,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:10,449 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:10,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:54:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2022-02-15 01:54:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-02-15 01:54:10,527 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 44 [2022-02-15 01:54:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:10,527 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-02-15 01:54:10,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-02-15 01:54:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:10,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:10,527 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:10,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-02-15 01:54:10,528 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash -45607125, now seen corresponding path program 132 times [2022-02-15 01:54:10,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:10,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289637652] [2022-02-15 01:54:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:10,529 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:10,529 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:10,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:10,530 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:10,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:10,688 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:10,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289637652] [2022-02-15 01:54:10,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [289637652] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:10,688 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:10,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:10,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476201793] [2022-02-15 01:54:10,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:10,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:10,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:10,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:10,689 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:11,118 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:54:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:11,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:11,118 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:54:11,118 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:54:11,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:11,119 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:11,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:54:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 133. [2022-02-15 01:54:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-15 01:54:11,198 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 44 [2022-02-15 01:54:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:11,198 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-15 01:54:11,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-15 01:54:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:11,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:11,199 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:11,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-02-15 01:54:11,199 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash -819593557, now seen corresponding path program 133 times [2022-02-15 01:54:11,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:11,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446205397] [2022-02-15 01:54:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:11,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:11,200 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:11,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:11,201 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:11,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:11,344 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:11,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446205397] [2022-02-15 01:54:11,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1446205397] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:11,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:11,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:11,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981822424] [2022-02-15 01:54:11,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:11,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:11,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:11,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:11,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:11,345 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:11,770 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:54:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:11,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:11,771 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:54:11,771 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:54:11,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:11,772 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:11,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:54:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 135. [2022-02-15 01:54:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-02-15 01:54:11,855 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 44 [2022-02-15 01:54:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:11,855 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-02-15 01:54:11,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-02-15 01:54:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:11,855 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:11,855 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:11,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-02-15 01:54:11,855 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1591212501, now seen corresponding path program 134 times [2022-02-15 01:54:11,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:11,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226177291] [2022-02-15 01:54:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:11,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:11,857 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:11,857 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:12,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:12,008 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:12,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226177291] [2022-02-15 01:54:12,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226177291] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:12,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:12,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:12,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591291345] [2022-02-15 01:54:12,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:12,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:12,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:12,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:12,009 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:12,432 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:54:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:12,432 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:12,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:12,433 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:54:12,433 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:54:12,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:12,434 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:12,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 21 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:54:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 137. [2022-02-15 01:54:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-15 01:54:12,518 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 44 [2022-02-15 01:54:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:12,519 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-15 01:54:12,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-15 01:54:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:54:12,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:12,519 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:12,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-02-15 01:54:12,519 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:12,519 INFO L85 PathProgramCache]: Analyzing trace with hash -87675477, now seen corresponding path program 135 times [2022-02-15 01:54:12,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:12,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953058855] [2022-02-15 01:54:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:12,520 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:12,520 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:12,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:12,521 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:12,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:12,674 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:12,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953058855] [2022-02-15 01:54:12,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1953058855] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:12,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:12,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:54:12,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425619677] [2022-02-15 01:54:12,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:12,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:54:12,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:54:12,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:54:12,675 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:13,077 INFO L93 Difference]: Finished difference Result 174 states and 251 transitions. [2022-02-15 01:54:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:54:13,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:54:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:13,078 INFO L225 Difference]: With dead ends: 174 [2022-02-15 01:54:13,078 INFO L226 Difference]: Without dead ends: 168 [2022-02-15 01:54:13,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=928, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:54:13,078 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:13,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-15 01:54:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 109. [2022-02-15 01:54:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-02-15 01:54:13,138 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 44 [2022-02-15 01:54:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:13,138 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-02-15 01:54:13,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-02-15 01:54:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:13,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:13,138 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:13,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-02-15 01:54:13,139 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1612472270, now seen corresponding path program 136 times [2022-02-15 01:54:13,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:13,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76448498] [2022-02-15 01:54:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:13,140 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:13,140 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:13,140 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:13,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:13,296 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:13,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76448498] [2022-02-15 01:54:13,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [76448498] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:13,296 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:13,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:13,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629389580] [2022-02-15 01:54:13,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:13,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:13,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:13,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:13,297 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:13,701 INFO L93 Difference]: Finished difference Result 124 states and 177 transitions. [2022-02-15 01:54:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:13,702 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:13,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:13,702 INFO L225 Difference]: With dead ends: 124 [2022-02-15 01:54:13,702 INFO L226 Difference]: Without dead ends: 118 [2022-02-15 01:54:13,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:13,703 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:13,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 25 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-15 01:54:13,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2022-02-15 01:54:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:13,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2022-02-15 01:54:13,764 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 46 [2022-02-15 01:54:13,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:13,764 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2022-02-15 01:54:13,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2022-02-15 01:54:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:13,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:13,765 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:13,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-02-15 01:54:13,765 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash 517523278, now seen corresponding path program 137 times [2022-02-15 01:54:13,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:13,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207861393] [2022-02-15 01:54:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:13,766 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:13,766 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:13,767 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:13,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:13,933 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:13,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207861393] [2022-02-15 01:54:13,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [207861393] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:13,934 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:13,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:13,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340742483] [2022-02-15 01:54:13,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:13,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:13,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:13,934 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:14,333 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2022-02-15 01:54:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:14,334 INFO L225 Difference]: With dead ends: 128 [2022-02-15 01:54:14,334 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:54:14,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:14,335 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:14,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 23 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:54:14,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2022-02-15 01:54:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2022-02-15 01:54:14,407 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 46 [2022-02-15 01:54:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:14,408 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2022-02-15 01:54:14,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2022-02-15 01:54:14,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:14,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:14,408 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:14,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-02-15 01:54:14,408 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:14,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:14,408 INFO L85 PathProgramCache]: Analyzing trace with hash 538529486, now seen corresponding path program 138 times [2022-02-15 01:54:14,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:14,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605721657] [2022-02-15 01:54:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:14,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:14,409 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:14,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:14,410 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:14,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:14,568 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:14,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605721657] [2022-02-15 01:54:14,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [605721657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:14,568 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:14,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:14,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638222322] [2022-02-15 01:54:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:14,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:14,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:14,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:14,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:14,569 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:14,972 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-15 01:54:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:14,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:14,973 INFO L225 Difference]: With dead ends: 134 [2022-02-15 01:54:14,973 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:54:14,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:14,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:14,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:54:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2022-02-15 01:54:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:15,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-02-15 01:54:15,046 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 46 [2022-02-15 01:54:15,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:15,046 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-02-15 01:54:15,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-02-15 01:54:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:15,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:15,047 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:15,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-02-15 01:54:15,047 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:15,047 INFO L85 PathProgramCache]: Analyzing trace with hash -749341106, now seen corresponding path program 139 times [2022-02-15 01:54:15,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:15,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795407550] [2022-02-15 01:54:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:15,048 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:15,048 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:15,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:15,049 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:15,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:15,208 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:15,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795407550] [2022-02-15 01:54:15,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [795407550] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:15,208 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:15,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:15,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597620207] [2022-02-15 01:54:15,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:15,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:15,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:15,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:15,209 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:15,612 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-15 01:54:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:15,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:15,613 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:54:15,613 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:54:15,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:15,614 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:15,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 15 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:15,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:54:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2022-02-15 01:54:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-02-15 01:54:15,688 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 46 [2022-02-15 01:54:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:15,688 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-02-15 01:54:15,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:15,688 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-02-15 01:54:15,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:15,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:15,688 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:15,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-02-15 01:54:15,689 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1442398770, now seen corresponding path program 140 times [2022-02-15 01:54:15,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:15,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352747327] [2022-02-15 01:54:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:15,690 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:15,690 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:15,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:15,690 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:15,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:15,849 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:15,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352747327] [2022-02-15 01:54:15,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [352747327] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:15,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:15,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:15,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564229988] [2022-02-15 01:54:15,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:15,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:15,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:15,850 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:16,266 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-15 01:54:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:16,267 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:54:16,267 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:54:16,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:16,267 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:16,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:54:16,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2022-02-15 01:54:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-02-15 01:54:16,342 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 46 [2022-02-15 01:54:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:16,343 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-02-15 01:54:16,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-02-15 01:54:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:16,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:16,343 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:16,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-02-15 01:54:16,343 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:16,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1750882994, now seen corresponding path program 141 times [2022-02-15 01:54:16,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:16,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130920473] [2022-02-15 01:54:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:16,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:16,344 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:16,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:16,345 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:16,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:16,505 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:16,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130920473] [2022-02-15 01:54:16,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1130920473] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:16,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:16,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:16,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707566953] [2022-02-15 01:54:16,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:16,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:16,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:16,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:16,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:16,506 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:16,923 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-15 01:54:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:16,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:16,923 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:54:16,923 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:54:16,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:16,924 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:16,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:54:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 125. [2022-02-15 01:54:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-02-15 01:54:17,000 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 46 [2022-02-15 01:54:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:17,000 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-02-15 01:54:17,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-02-15 01:54:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:17,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:17,001 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:17,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-02-15 01:54:17,001 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1851478834, now seen corresponding path program 142 times [2022-02-15 01:54:17,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:17,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860316921] [2022-02-15 01:54:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:17,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:17,002 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:17,003 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:17,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:17,175 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:17,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860316921] [2022-02-15 01:54:17,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1860316921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:17,175 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:17,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:17,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700323358] [2022-02-15 01:54:17,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:17,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:17,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:17,176 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:17,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:17,601 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-15 01:54:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:17,601 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:17,602 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:54:17,602 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:54:17,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:17,602 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:17,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:54:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2022-02-15 01:54:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-02-15 01:54:17,681 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 46 [2022-02-15 01:54:17,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:17,681 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-02-15 01:54:17,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:17,681 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-02-15 01:54:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:17,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:17,681 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:17,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-02-15 01:54:17,682 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:17,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:17,682 INFO L85 PathProgramCache]: Analyzing trace with hash 260166734, now seen corresponding path program 143 times [2022-02-15 01:54:17,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:17,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801884354] [2022-02-15 01:54:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:17,683 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:17,683 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:17,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:17,683 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:17,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:17,842 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:17,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801884354] [2022-02-15 01:54:17,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801884354] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:17,842 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:17,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:17,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716484023] [2022-02-15 01:54:17,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:17,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:17,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:17,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:17,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:17,843 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:18,281 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:54:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:18,281 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:18,282 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:54:18,282 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:54:18,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:18,282 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:18,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 22 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:54:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2022-02-15 01:54:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-02-15 01:54:18,363 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 46 [2022-02-15 01:54:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:18,364 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-02-15 01:54:18,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-02-15 01:54:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:18,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:18,364 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:18,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-02-15 01:54:18,364 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1967973426, now seen corresponding path program 144 times [2022-02-15 01:54:18,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:18,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816721877] [2022-02-15 01:54:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:18,365 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:18,365 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:18,366 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:18,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:18,524 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:18,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816721877] [2022-02-15 01:54:18,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816721877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:18,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:18,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:18,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291335564] [2022-02-15 01:54:18,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:18,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:18,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:18,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:18,525 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:18,960 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:54:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:18,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:18,960 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:54:18,960 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:54:18,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:18,961 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:18,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:54:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 131. [2022-02-15 01:54:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-02-15 01:54:19,047 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 46 [2022-02-15 01:54:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:19,047 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-02-15 01:54:19,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-02-15 01:54:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:19,048 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:19,048 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:19,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-02-15 01:54:19,048 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash -21986482, now seen corresponding path program 145 times [2022-02-15 01:54:19,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:19,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621694128] [2022-02-15 01:54:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:19,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:19,049 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:19,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:19,050 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:19,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:19,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:19,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621694128] [2022-02-15 01:54:19,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1621694128] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:19,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:19,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:19,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514461044] [2022-02-15 01:54:19,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:19,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:19,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:19,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:19,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:19,210 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:19,648 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:54:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:19,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:19,654 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:54:19,654 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:54:19,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:19,654 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:19,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:54:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 133. [2022-02-15 01:54:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-15 01:54:19,740 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 46 [2022-02-15 01:54:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:19,741 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-15 01:54:19,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-15 01:54:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:19,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:19,741 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:19,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-02-15 01:54:19,741 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1760692942, now seen corresponding path program 146 times [2022-02-15 01:54:19,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:19,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895779690] [2022-02-15 01:54:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:19,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:19,743 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:19,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:19,744 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:19,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:19,902 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:19,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895779690] [2022-02-15 01:54:19,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895779690] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:19,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:19,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:19,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265175369] [2022-02-15 01:54:19,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:19,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:19,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:19,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:19,903 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:20,358 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:54:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:20,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:20,359 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:54:20,359 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:54:20,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:20,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:20,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:54:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 135. [2022-02-15 01:54:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-02-15 01:54:20,448 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 46 [2022-02-15 01:54:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:20,448 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-02-15 01:54:20,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-02-15 01:54:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:20,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:20,448 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:20,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-02-15 01:54:20,448 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1223668302, now seen corresponding path program 147 times [2022-02-15 01:54:20,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:20,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832358053] [2022-02-15 01:54:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:20,449 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:20,450 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:20,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:20,450 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:20,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:20,609 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:20,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832358053] [2022-02-15 01:54:20,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [832358053] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:20,609 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:20,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:20,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673140089] [2022-02-15 01:54:20,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:20,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:20,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:20,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:20,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:20,610 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:21,065 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:54:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:21,065 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:54:21,066 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:54:21,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:21,066 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:21,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 23 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:54:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 137. [2022-02-15 01:54:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-15 01:54:21,158 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 46 [2022-02-15 01:54:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:21,158 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-15 01:54:21,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-15 01:54:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:21,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:21,159 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:21,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-02-15 01:54:21,159 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:21,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:21,159 INFO L85 PathProgramCache]: Analyzing trace with hash 539064782, now seen corresponding path program 148 times [2022-02-15 01:54:21,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:21,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237362613] [2022-02-15 01:54:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:21,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:21,160 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:21,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:21,161 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:21,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:21,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:21,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237362613] [2022-02-15 01:54:21,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [237362613] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:21,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:21,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:21,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182585593] [2022-02-15 01:54:21,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:21,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:21,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:21,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:21,338 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:21,828 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:54:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:21,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:21,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:21,829 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:54:21,829 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:54:21,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:21,829 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:21,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:54:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 139. [2022-02-15 01:54:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-02-15 01:54:21,923 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 46 [2022-02-15 01:54:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:21,923 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-02-15 01:54:21,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-02-15 01:54:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:21,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:21,923 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:21,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-02-15 01:54:21,924 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:21,924 INFO L85 PathProgramCache]: Analyzing trace with hash -234921650, now seen corresponding path program 149 times [2022-02-15 01:54:21,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:21,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118973019] [2022-02-15 01:54:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:21,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:21,925 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:21,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:21,925 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:22,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:22,087 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:22,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118973019] [2022-02-15 01:54:22,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1118973019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:22,087 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:22,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:22,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102952444] [2022-02-15 01:54:22,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:22,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:22,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:22,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:22,088 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:22,572 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:54:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:22,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:22,573 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:54:22,573 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:54:22,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:22,574 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:22,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 23 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:54:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 141. [2022-02-15 01:54:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-02-15 01:54:22,667 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 46 [2022-02-15 01:54:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:22,667 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-02-15 01:54:22,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-02-15 01:54:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:22,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:22,667 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:22,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-02-15 01:54:22,668 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:22,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1006540594, now seen corresponding path program 150 times [2022-02-15 01:54:22,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:22,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337373962] [2022-02-15 01:54:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:22,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:22,669 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:22,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:22,669 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:22,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:22,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:22,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337373962] [2022-02-15 01:54:22,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1337373962] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:22,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:22,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:22,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138091727] [2022-02-15 01:54:22,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:22,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:22,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:22,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:22,831 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:23,294 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:54:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:23,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:23,296 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:54:23,296 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:54:23,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:23,296 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:23,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:54:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2022-02-15 01:54:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-15 01:54:23,395 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 46 [2022-02-15 01:54:23,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:23,395 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-15 01:54:23,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-15 01:54:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:23,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:23,395 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:23,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-02-15 01:54:23,396 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash 496996430, now seen corresponding path program 151 times [2022-02-15 01:54:23,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:23,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919313750] [2022-02-15 01:54:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:23,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:23,397 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:23,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:23,397 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:23,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:23,559 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:23,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919313750] [2022-02-15 01:54:23,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [919313750] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:23,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:23,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:23,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121092734] [2022-02-15 01:54:23,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:23,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:23,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:23,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:23,560 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:24,034 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:54:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:24,034 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:24,035 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:54:24,035 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:54:24,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:24,035 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:24,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 17 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:54:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 145. [2022-02-15 01:54:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-15 01:54:24,131 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 46 [2022-02-15 01:54:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:24,131 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-15 01:54:24,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-15 01:54:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:54:24,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:24,131 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:24,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-02-15 01:54:24,131 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2007902258, now seen corresponding path program 152 times [2022-02-15 01:54:24,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:24,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164279682] [2022-02-15 01:54:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:24,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:24,133 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:24,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:24,133 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:24,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:24,305 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:24,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164279682] [2022-02-15 01:54:24,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [164279682] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:24,305 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:24,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:54:24,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826781331] [2022-02-15 01:54:24,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:24,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:54:24,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:54:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:54:24,306 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:24,747 INFO L93 Difference]: Finished difference Result 184 states and 266 transitions. [2022-02-15 01:54:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:54:24,748 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:54:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:24,748 INFO L225 Difference]: With dead ends: 184 [2022-02-15 01:54:24,748 INFO L226 Difference]: Without dead ends: 178 [2022-02-15 01:54:24,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=613, Invalid=1027, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:54:24,749 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:24,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-15 01:54:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 115. [2022-02-15 01:54:24,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2022-02-15 01:54:24,821 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 46 [2022-02-15 01:54:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:24,821 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2022-02-15 01:54:24,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2022-02-15 01:54:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:24,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:24,822 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:24,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-02-15 01:54:24,822 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:24,822 INFO L85 PathProgramCache]: Analyzing trace with hash 841459121, now seen corresponding path program 153 times [2022-02-15 01:54:24,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:24,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687000756] [2022-02-15 01:54:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:24,823 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:24,823 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:24,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:24,823 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:24,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:24,993 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:24,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687000756] [2022-02-15 01:54:24,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687000756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:24,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:24,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:24,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913539011] [2022-02-15 01:54:24,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:24,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:24,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:24,994 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:25,435 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2022-02-15 01:54:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:25,435 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:25,435 INFO L225 Difference]: With dead ends: 130 [2022-02-15 01:54:25,435 INFO L226 Difference]: Without dead ends: 124 [2022-02-15 01:54:25,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:25,436 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:25,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 21 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-15 01:54:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-02-15 01:54:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-02-15 01:54:25,512 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 48 [2022-02-15 01:54:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:25,512 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-02-15 01:54:25,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-02-15 01:54:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:25,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:25,512 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:25,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-02-15 01:54:25,512 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:25,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash -253489871, now seen corresponding path program 154 times [2022-02-15 01:54:25,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:25,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727277403] [2022-02-15 01:54:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:25,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:25,514 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:25,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:25,514 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:25,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:25,690 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:25,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727277403] [2022-02-15 01:54:25,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1727277403] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:25,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:25,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:25,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275241683] [2022-02-15 01:54:25,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:25,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:25,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:25,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:25,691 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:26,124 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-02-15 01:54:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:26,124 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:26,125 INFO L225 Difference]: With dead ends: 134 [2022-02-15 01:54:26,125 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:54:26,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:26,125 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:26,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 23 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:54:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-02-15 01:54:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2022-02-15 01:54:26,207 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 48 [2022-02-15 01:54:26,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:26,207 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2022-02-15 01:54:26,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2022-02-15 01:54:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:26,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:26,208 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:26,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-02-15 01:54:26,208 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:26,208 INFO L85 PathProgramCache]: Analyzing trace with hash -232483663, now seen corresponding path program 155 times [2022-02-15 01:54:26,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:26,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398511186] [2022-02-15 01:54:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:26,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:26,209 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:26,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:26,210 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:26,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:26,380 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:26,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398511186] [2022-02-15 01:54:26,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [398511186] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:26,380 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:26,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:26,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971794850] [2022-02-15 01:54:26,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:26,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:26,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:26,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:26,381 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:26,814 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-15 01:54:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:26,815 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:26,815 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:54:26,815 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:54:26,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:26,816 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:26,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:54:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2022-02-15 01:54:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-02-15 01:54:26,898 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 48 [2022-02-15 01:54:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:26,898 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-02-15 01:54:26,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-02-15 01:54:26,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:26,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:26,899 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:26,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-02-15 01:54:26,899 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:26,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1520354255, now seen corresponding path program 156 times [2022-02-15 01:54:26,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:26,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728389535] [2022-02-15 01:54:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:26,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:26,900 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:26,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:26,901 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:27,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:27,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:27,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728389535] [2022-02-15 01:54:27,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [728389535] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:27,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:27,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:27,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106901084] [2022-02-15 01:54:27,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:27,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:27,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:27,074 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:27,518 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-15 01:54:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:27,519 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:54:27,519 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:54:27,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:27,520 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:27,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:54:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 127. [2022-02-15 01:54:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-02-15 01:54:27,602 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 48 [2022-02-15 01:54:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:27,602 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-02-15 01:54:27,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-02-15 01:54:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:27,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:27,603 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:27,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-02-15 01:54:27,603 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2081555377, now seen corresponding path program 157 times [2022-02-15 01:54:27,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:27,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12735401] [2022-02-15 01:54:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:27,604 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:27,604 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:27,605 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:27,777 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:27,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12735401] [2022-02-15 01:54:27,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [12735401] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:27,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:27,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:27,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594277985] [2022-02-15 01:54:27,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:27,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:27,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:27,777 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:28,234 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-15 01:54:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:28,234 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:28,235 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:54:28,235 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:54:28,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:28,235 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:28,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:54:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 129. [2022-02-15 01:54:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-02-15 01:54:28,321 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 48 [2022-02-15 01:54:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:28,321 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-02-15 01:54:28,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-02-15 01:54:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:28,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:28,322 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:28,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-02-15 01:54:28,322 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:28,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1773071153, now seen corresponding path program 158 times [2022-02-15 01:54:28,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:28,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941913063] [2022-02-15 01:54:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:28,323 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:28,323 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:28,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:28,324 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:28,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:28,504 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:28,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941913063] [2022-02-15 01:54:28,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1941913063] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:28,504 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:28,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:28,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706262066] [2022-02-15 01:54:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:28,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:28,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:28,505 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:28,968 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-15 01:54:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:28,969 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:54:28,969 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:54:28,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:28,969 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:28,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 23 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:28,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:54:29,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 131. [2022-02-15 01:54:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-02-15 01:54:29,059 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 48 [2022-02-15 01:54:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:29,060 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-02-15 01:54:29,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:29,060 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-02-15 01:54:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:29,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:29,060 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:29,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-02-15 01:54:29,060 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1672475313, now seen corresponding path program 159 times [2022-02-15 01:54:29,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:29,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331781553] [2022-02-15 01:54:29,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:29,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:29,061 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:29,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:29,062 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:29,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:29,235 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:29,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331781553] [2022-02-15 01:54:29,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1331781553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:29,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:29,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:29,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955012667] [2022-02-15 01:54:29,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:29,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:29,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:29,236 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:29,695 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:54:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:29,695 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:29,695 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:54:29,695 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:54:29,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:29,696 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:29,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:54:29,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-02-15 01:54:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-15 01:54:29,791 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 48 [2022-02-15 01:54:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:29,791 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-15 01:54:29,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-15 01:54:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:29,791 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:29,791 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:29,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-02-15 01:54:29,792 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash -510846415, now seen corresponding path program 160 times [2022-02-15 01:54:29,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:29,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605241156] [2022-02-15 01:54:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:29,793 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:29,793 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:29,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:29,793 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:29,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:29,969 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:29,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605241156] [2022-02-15 01:54:29,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1605241156] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:29,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:29,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:29,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894140426] [2022-02-15 01:54:29,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:29,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:29,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:29,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:29,970 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:30,442 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:54:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:30,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:30,443 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:54:30,443 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:54:30,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:30,443 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:30,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:54:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 135. [2022-02-15 01:54:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-02-15 01:54:30,536 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 48 [2022-02-15 01:54:30,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:30,536 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-02-15 01:54:30,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-02-15 01:54:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:30,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:30,537 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:30,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-02-15 01:54:30,537 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1555980721, now seen corresponding path program 161 times [2022-02-15 01:54:30,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:30,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522004009] [2022-02-15 01:54:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:30,538 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:30,538 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:30,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:30,539 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:30,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:30,719 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:30,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522004009] [2022-02-15 01:54:30,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522004009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:30,719 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:30,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:30,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569755812] [2022-02-15 01:54:30,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:30,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:30,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:30,720 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:31,205 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:54:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:31,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:31,205 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:54:31,205 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:54:31,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:31,206 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:31,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:54:31,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2022-02-15 01:54:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-15 01:54:31,305 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 48 [2022-02-15 01:54:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:31,305 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-15 01:54:31,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-15 01:54:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:31,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:31,305 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:31,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-02-15 01:54:31,306 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:31,306 INFO L85 PathProgramCache]: Analyzing trace with hash -792999631, now seen corresponding path program 162 times [2022-02-15 01:54:31,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:31,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137087028] [2022-02-15 01:54:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:31,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:31,307 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:31,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:31,307 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:31,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:31,479 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:31,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137087028] [2022-02-15 01:54:31,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1137087028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:31,479 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:31,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:31,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030569008] [2022-02-15 01:54:31,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:31,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:31,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:31,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:31,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:31,480 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:31,969 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:54:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:31,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:31,970 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:54:31,970 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:54:31,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:31,970 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:31,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:54:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 139. [2022-02-15 01:54:32,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-02-15 01:54:32,069 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 48 [2022-02-15 01:54:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:32,069 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-02-15 01:54:32,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-02-15 01:54:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:32,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:32,070 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:32,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-02-15 01:54:32,070 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:32,070 INFO L85 PathProgramCache]: Analyzing trace with hash 989679793, now seen corresponding path program 163 times [2022-02-15 01:54:32,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:32,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650884409] [2022-02-15 01:54:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:32,071 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:32,071 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:32,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:32,072 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:32,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:32,257 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:32,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650884409] [2022-02-15 01:54:32,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650884409] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:32,257 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:32,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:32,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558564966] [2022-02-15 01:54:32,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:32,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:32,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:32,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:32,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:32,258 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:32,749 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:54:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:32,750 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:32,750 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:54:32,750 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:54:32,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:32,751 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:32,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:54:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 141. [2022-02-15 01:54:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-02-15 01:54:32,854 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 48 [2022-02-15 01:54:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:32,854 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-02-15 01:54:32,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-02-15 01:54:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:32,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:32,854 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:32,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-02-15 01:54:32,855 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:32,855 INFO L85 PathProgramCache]: Analyzing trace with hash 452655153, now seen corresponding path program 164 times [2022-02-15 01:54:32,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:32,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585795642] [2022-02-15 01:54:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:32,856 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:32,856 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:32,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:32,857 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:33,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:33,043 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:33,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585795642] [2022-02-15 01:54:33,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585795642] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:33,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:33,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:33,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844387651] [2022-02-15 01:54:33,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:33,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:33,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:33,044 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:33,575 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:54:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:33,576 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:54:33,576 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:54:33,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:33,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:33,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:54:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 143. [2022-02-15 01:54:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-15 01:54:33,681 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 48 [2022-02-15 01:54:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:33,681 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-15 01:54:33,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-15 01:54:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:33,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:33,681 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:33,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-02-15 01:54:33,681 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:33,682 INFO L85 PathProgramCache]: Analyzing trace with hash -231948367, now seen corresponding path program 165 times [2022-02-15 01:54:33,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:33,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523200805] [2022-02-15 01:54:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:33,683 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:33,683 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:33,683 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:33,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:33,856 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:33,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523200805] [2022-02-15 01:54:33,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1523200805] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:33,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:33,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:33,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163660085] [2022-02-15 01:54:33,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:33,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:33,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:33,857 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:34,364 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:54:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:34,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:34,371 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:54:34,371 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:54:34,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:34,372 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:34,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 23 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:54:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 145. [2022-02-15 01:54:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-15 01:54:34,481 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 48 [2022-02-15 01:54:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:34,482 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-15 01:54:34,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-15 01:54:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:34,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:34,482 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:34,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-02-15 01:54:34,482 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:34,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1005934799, now seen corresponding path program 166 times [2022-02-15 01:54:34,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:34,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86665446] [2022-02-15 01:54:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:34,483 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:34,483 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:34,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:34,484 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:34,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:34,656 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:34,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86665446] [2022-02-15 01:54:34,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [86665446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:34,656 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:34,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:34,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173324229] [2022-02-15 01:54:34,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:34,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:34,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:34,657 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:35,165 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:54:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:35,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:35,166 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:54:35,166 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:54:35,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:35,166 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:35,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 17 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:54:35,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2022-02-15 01:54:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-15 01:54:35,275 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 48 [2022-02-15 01:54:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:35,275 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-15 01:54:35,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-15 01:54:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:35,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:35,276 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:35,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-02-15 01:54:35,276 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1777553743, now seen corresponding path program 167 times [2022-02-15 01:54:35,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:35,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856591649] [2022-02-15 01:54:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:35,277 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:35,277 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:35,278 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:35,462 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:35,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856591649] [2022-02-15 01:54:35,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [856591649] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:35,462 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:35,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:35,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448320854] [2022-02-15 01:54:35,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:35,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:35,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:35,463 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:35,982 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:54:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:35,982 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:35,983 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:54:35,983 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:54:35,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:35,983 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:35,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 25 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:35,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:54:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 149. [2022-02-15 01:54:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-15 01:54:36,098 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 48 [2022-02-15 01:54:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:36,098 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-15 01:54:36,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-15 01:54:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:36,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:36,099 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:36,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2022-02-15 01:54:36,099 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash -274016719, now seen corresponding path program 168 times [2022-02-15 01:54:36,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:36,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398550802] [2022-02-15 01:54:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:36,100 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:36,100 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:36,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:36,101 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:36,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:36,287 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:36,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398550802] [2022-02-15 01:54:36,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [398550802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:36,288 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:36,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:36,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468599209] [2022-02-15 01:54:36,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:36,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:36,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:36,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:36,289 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:36,805 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:54:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:36,806 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:54:36,806 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:54:36,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:36,807 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:36,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 19 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:36,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:54:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 151. [2022-02-15 01:54:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-15 01:54:36,921 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 48 [2022-02-15 01:54:36,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:36,921 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-15 01:54:36,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-15 01:54:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:36,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:36,922 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:36,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-02-15 01:54:36,922 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:36,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1516051889, now seen corresponding path program 169 times [2022-02-15 01:54:36,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:36,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411356853] [2022-02-15 01:54:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:36,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:36,923 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:36,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:36,924 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:37,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:37,122 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:37,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411356853] [2022-02-15 01:54:37,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [411356853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:37,122 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:37,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:37,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578661802] [2022-02-15 01:54:37,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:37,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:37,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:37,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:37,123 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:37,646 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:54:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:37,646 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:54:37,646 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:54:37,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:37,647 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:37,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:54:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 153. [2022-02-15 01:54:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-15 01:54:37,758 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 48 [2022-02-15 01:54:37,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:37,758 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-15 01:54:37,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:37,759 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-15 01:54:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:54:37,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:37,759 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:37,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-02-15 01:54:37,759 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:37,759 INFO L85 PathProgramCache]: Analyzing trace with hash -509901519, now seen corresponding path program 170 times [2022-02-15 01:54:37,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:37,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986780786] [2022-02-15 01:54:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:37,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:37,760 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:37,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:37,761 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:37,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:37,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:37,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986780786] [2022-02-15 01:54:37,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1986780786] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:37,938 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:37,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:54:37,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105901440] [2022-02-15 01:54:37,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:37,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:54:37,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:37,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:54:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:54:37,938 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:38,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:38,425 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:54:38,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:54:38,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:54:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:38,426 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:54:38,426 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:54:38,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1131, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:54:38,427 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:38,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 17 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:54:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 121. [2022-02-15 01:54:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2022-02-15 01:54:38,510 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 48 [2022-02-15 01:54:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:38,510 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2022-02-15 01:54:38,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2022-02-15 01:54:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:38,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:38,510 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:38,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2022-02-15 01:54:38,510 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:38,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1367802156, now seen corresponding path program 171 times [2022-02-15 01:54:38,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:38,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389118116] [2022-02-15 01:54:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:38,512 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:38,512 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:38,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:38,512 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:38,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:38,700 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:38,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389118116] [2022-02-15 01:54:38,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1389118116] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:38,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:38,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:38,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504242084] [2022-02-15 01:54:38,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:38,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:38,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:38,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:38,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:38,701 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:39,180 INFO L93 Difference]: Finished difference Result 136 states and 195 transitions. [2022-02-15 01:54:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:39,180 INFO L225 Difference]: With dead ends: 136 [2022-02-15 01:54:39,180 INFO L226 Difference]: Without dead ends: 130 [2022-02-15 01:54:39,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:39,181 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:39,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 21 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-15 01:54:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-02-15 01:54:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2022-02-15 01:54:39,264 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 50 [2022-02-15 01:54:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:39,264 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2022-02-15 01:54:39,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2022-02-15 01:54:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:39,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:39,264 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:39,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2022-02-15 01:54:39,265 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1832216148, now seen corresponding path program 172 times [2022-02-15 01:54:39,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:39,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445695671] [2022-02-15 01:54:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:39,266 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:39,266 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:39,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:39,266 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:39,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:39,450 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:39,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445695671] [2022-02-15 01:54:39,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [445695671] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:39,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:39,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:39,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565974756] [2022-02-15 01:54:39,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:39,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:39,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:39,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:39,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:39,451 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:39,918 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2022-02-15 01:54:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:39,919 INFO L225 Difference]: With dead ends: 140 [2022-02-15 01:54:39,919 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:54:39,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:39,919 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:39,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:54:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-02-15 01:54:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2022-02-15 01:54:40,009 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 50 [2022-02-15 01:54:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:40,009 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2022-02-15 01:54:40,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:40,009 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2022-02-15 01:54:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:40,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:40,010 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:40,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2022-02-15 01:54:40,010 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:40,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1853222356, now seen corresponding path program 173 times [2022-02-15 01:54:40,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:40,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669229169] [2022-02-15 01:54:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:40,011 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:40,011 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:40,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:40,012 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:40,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:40,198 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:40,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669229169] [2022-02-15 01:54:40,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [669229169] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:40,198 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:40,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:40,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414240853] [2022-02-15 01:54:40,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:40,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:40,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:40,199 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:40,676 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-15 01:54:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:40,676 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:40,676 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:54:40,676 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:54:40,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:40,677 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:40,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:54:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 131. [2022-02-15 01:54:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-02-15 01:54:40,770 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 50 [2022-02-15 01:54:40,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:40,770 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-02-15 01:54:40,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-02-15 01:54:40,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:40,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:40,770 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:40,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2022-02-15 01:54:40,770 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash 565351764, now seen corresponding path program 174 times [2022-02-15 01:54:40,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:40,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898149612] [2022-02-15 01:54:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:40,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:40,771 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:40,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:40,772 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:40,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:40,960 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:40,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898149612] [2022-02-15 01:54:40,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1898149612] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:40,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:40,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:40,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103767453] [2022-02-15 01:54:40,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:40,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:40,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:40,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:40,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:40,961 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:41,448 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-15 01:54:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:41,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:41,449 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:54:41,449 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:54:41,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:41,450 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:41,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:54:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 133. [2022-02-15 01:54:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-15 01:54:41,548 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 50 [2022-02-15 01:54:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:41,549 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-15 01:54:41,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-15 01:54:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:41,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:41,549 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:41,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2022-02-15 01:54:41,549 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:41,549 INFO L85 PathProgramCache]: Analyzing trace with hash -127705900, now seen corresponding path program 175 times [2022-02-15 01:54:41,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:41,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435163458] [2022-02-15 01:54:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:41,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:41,550 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:41,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:41,551 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:41,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:41,765 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:41,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435163458] [2022-02-15 01:54:41,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1435163458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:41,765 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:41,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:41,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669386536] [2022-02-15 01:54:41,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:41,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:41,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:41,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:41,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:41,766 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:42,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:42,261 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-15 01:54:42,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:42,262 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:42,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:42,262 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:54:42,262 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:54:42,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:42,267 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:42,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 21 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:54:42,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2022-02-15 01:54:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-02-15 01:54:42,366 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 50 [2022-02-15 01:54:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:42,366 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-02-15 01:54:42,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-02-15 01:54:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:42,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:42,366 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:42,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-02-15 01:54:42,366 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash -436190124, now seen corresponding path program 176 times [2022-02-15 01:54:42,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:42,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788594632] [2022-02-15 01:54:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:42,368 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:42,368 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:42,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:42,368 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:42,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:42,554 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:42,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788594632] [2022-02-15 01:54:42,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1788594632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:42,555 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:42,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:42,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213798560] [2022-02-15 01:54:42,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:42,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:42,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:42,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:42,555 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:43,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:43,057 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:54:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:43,057 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:43,057 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:54:43,058 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:54:43,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:43,058 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:43,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 23 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:54:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2022-02-15 01:54:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-15 01:54:43,162 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 50 [2022-02-15 01:54:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:43,162 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-15 01:54:43,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-15 01:54:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:43,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:43,163 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:43,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-02-15 01:54:43,163 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash -536785964, now seen corresponding path program 177 times [2022-02-15 01:54:43,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:43,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856366700] [2022-02-15 01:54:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:43,164 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:43,164 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:43,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:43,165 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:43,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:43,351 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:43,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856366700] [2022-02-15 01:54:43,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1856366700] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:43,351 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:43,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:43,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184945951] [2022-02-15 01:54:43,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:43,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:43,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:43,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:43,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:43,352 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:43,859 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:54:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:43,859 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:43,860 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:54:43,860 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:54:43,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:43,860 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:43,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:54:43,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 139. [2022-02-15 01:54:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-02-15 01:54:43,966 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 50 [2022-02-15 01:54:43,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:43,966 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-02-15 01:54:43,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-02-15 01:54:43,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:43,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:43,967 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:43,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2022-02-15 01:54:43,967 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:43,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1574859604, now seen corresponding path program 178 times [2022-02-15 01:54:43,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:43,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242830789] [2022-02-15 01:54:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:43,968 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:43,968 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:43,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:43,969 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:44,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:44,171 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:44,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242830789] [2022-02-15 01:54:44,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1242830789] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:44,171 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:44,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:44,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004928085] [2022-02-15 01:54:44,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:44,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:44,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:44,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:44,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:44,172 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:44,690 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:54:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:44,690 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:44,691 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:54:44,691 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:54:44,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:44,691 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:44,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:54:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 141. [2022-02-15 01:54:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-02-15 01:54:44,800 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 50 [2022-02-15 01:54:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:44,800 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-02-15 01:54:44,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-02-15 01:54:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:44,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:44,801 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:44,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2022-02-15 01:54:44,801 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:44,801 INFO L85 PathProgramCache]: Analyzing trace with hash -653280556, now seen corresponding path program 179 times [2022-02-15 01:54:44,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:44,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981265514] [2022-02-15 01:54:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:44,802 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:44,802 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:44,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:44,803 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:44,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:44,999 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:44,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981265514] [2022-02-15 01:54:44,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [981265514] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:44,999 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:44,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:44,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581860206] [2022-02-15 01:54:44,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:44,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:44,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:45,000 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:45,521 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:54:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:45,521 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:45,522 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:54:45,522 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:54:45,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:45,522 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:45,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 21 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:54:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2022-02-15 01:54:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-15 01:54:45,632 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 50 [2022-02-15 01:54:45,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:45,632 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-15 01:54:45,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-15 01:54:45,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:45,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:45,632 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:45,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2022-02-15 01:54:45,632 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1292706388, now seen corresponding path program 180 times [2022-02-15 01:54:45,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:45,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829913420] [2022-02-15 01:54:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:45,634 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:45,634 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:45,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:45,634 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:45,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:45,820 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:45,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829913420] [2022-02-15 01:54:45,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829913420] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:45,820 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:45,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:45,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736596226] [2022-02-15 01:54:45,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:45,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:45,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:45,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:45,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:45,821 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:46,349 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:54:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:46,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:46,350 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:54:46,350 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:54:46,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:46,351 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:46,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 23 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:46,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:54:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2022-02-15 01:54:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-15 01:54:46,468 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 50 [2022-02-15 01:54:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:46,468 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-15 01:54:46,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-15 01:54:46,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:46,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:46,468 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:46,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2022-02-15 01:54:46,469 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1219581484, now seen corresponding path program 181 times [2022-02-15 01:54:46,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:46,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956012509] [2022-02-15 01:54:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:46,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:46,470 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:46,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:46,471 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:46,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:46,660 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:46,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956012509] [2022-02-15 01:54:46,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [956012509] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:46,660 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:46,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:46,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086619917] [2022-02-15 01:54:46,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:46,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:46,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:46,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:46,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:46,661 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:47,201 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:54:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:47,201 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:47,202 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:54:47,202 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:54:47,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:47,202 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:47,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 21 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:54:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2022-02-15 01:54:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-15 01:54:47,318 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 50 [2022-02-15 01:54:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:47,318 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-15 01:54:47,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-15 01:54:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:47,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:47,319 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:47,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2022-02-15 01:54:47,319 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:47,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1756606124, now seen corresponding path program 182 times [2022-02-15 01:54:47,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:47,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616360433] [2022-02-15 01:54:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:47,320 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:47,320 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:47,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:47,321 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:47,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:47,515 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:47,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616360433] [2022-02-15 01:54:47,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616360433] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:47,515 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:47,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:47,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464045739] [2022-02-15 01:54:47,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:47,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:47,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:47,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:47,516 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:48,059 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:54:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:48,060 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:48,060 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:54:48,060 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:54:48,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:48,061 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:48,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 15 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:54:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 149. [2022-02-15 01:54:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-15 01:54:48,180 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 50 [2022-02-15 01:54:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:48,180 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-15 01:54:48,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-15 01:54:48,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:48,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:48,181 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:48,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2022-02-15 01:54:48,181 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1853757652, now seen corresponding path program 183 times [2022-02-15 01:54:48,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:48,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250367426] [2022-02-15 01:54:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:48,182 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:48,182 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:48,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:48,182 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:48,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:48,367 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:48,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250367426] [2022-02-15 01:54:48,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1250367426] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:48,368 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:48,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:48,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036224358] [2022-02-15 01:54:48,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:48,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:48,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:48,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:48,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:48,368 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:48,923 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:54:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:48,923 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:48,924 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:54:48,924 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:54:48,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:48,924 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:48,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:54:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 151. [2022-02-15 01:54:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-15 01:54:49,048 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 50 [2022-02-15 01:54:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:49,048 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-15 01:54:49,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-15 01:54:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:49,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:49,049 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:49,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2022-02-15 01:54:49,049 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:49,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1079771220, now seen corresponding path program 184 times [2022-02-15 01:54:49,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:49,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869004236] [2022-02-15 01:54:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:49,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:49,050 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:49,051 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:49,244 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:49,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869004236] [2022-02-15 01:54:49,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869004236] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:49,244 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:49,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:49,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84673305] [2022-02-15 01:54:49,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:49,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:49,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:49,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:49,245 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:49,812 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:54:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:49,812 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:49,813 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:54:49,813 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:54:49,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:49,813 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:49,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:54:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 153. [2022-02-15 01:54:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-15 01:54:49,939 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 50 [2022-02-15 01:54:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:49,939 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-15 01:54:49,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-15 01:54:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:49,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:49,939 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:49,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2022-02-15 01:54:49,940 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash 308152276, now seen corresponding path program 185 times [2022-02-15 01:54:49,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:49,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521883903] [2022-02-15 01:54:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:49,941 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:49,941 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:49,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:49,941 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:50,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:50,127 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:50,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521883903] [2022-02-15 01:54:50,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521883903] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:50,127 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:50,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:50,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804140098] [2022-02-15 01:54:50,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:50,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:50,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:50,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:50,128 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:50,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:50,688 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:54:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:50,688 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:50,689 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:54:50,689 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:54:50,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:50,689 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:50,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:54:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 155. [2022-02-15 01:54:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-15 01:54:50,816 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 50 [2022-02-15 01:54:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:50,816 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-15 01:54:50,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-15 01:54:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:50,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:50,817 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:50,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2022-02-15 01:54:50,817 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:50,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1811689300, now seen corresponding path program 186 times [2022-02-15 01:54:50,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:50,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484051071] [2022-02-15 01:54:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:50,818 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:50,818 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:50,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:50,819 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:51,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:51,006 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:51,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484051071] [2022-02-15 01:54:51,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484051071] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:51,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:51,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:51,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587368956] [2022-02-15 01:54:51,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:51,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:51,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:51,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:51,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:51,007 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:51,582 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:54:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:51,582 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:51,583 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:54:51,583 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:54:51,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:51,583 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:51,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:54:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 157. [2022-02-15 01:54:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-15 01:54:51,712 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 50 [2022-02-15 01:54:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:51,712 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-15 01:54:51,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-15 01:54:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:51,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:51,713 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:51,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2022-02-15 01:54:51,713 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash -693209388, now seen corresponding path program 187 times [2022-02-15 01:54:51,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:51,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441503925] [2022-02-15 01:54:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:51,714 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:51,714 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:51,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:51,715 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:51,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:51,905 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:51,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441503925] [2022-02-15 01:54:51,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [441503925] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:51,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:51,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:51,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708363463] [2022-02-15 01:54:51,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:51,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:51,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:51,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:51,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:51,906 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:52,486 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:54:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:52,487 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:54:52,487 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:54:52,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:52,487 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:52,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:54:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 159. [2022-02-15 01:54:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-15 01:54:52,618 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 50 [2022-02-15 01:54:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:52,618 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-15 01:54:52,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-15 01:54:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:52,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:52,618 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:52,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2022-02-15 01:54:52,619 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:52,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1575804500, now seen corresponding path program 188 times [2022-02-15 01:54:52,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:52,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544922288] [2022-02-15 01:54:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:52,620 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:52,620 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:52,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:52,621 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:52,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:52,810 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:52,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544922288] [2022-02-15 01:54:52,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [544922288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:52,810 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:52,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:52,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255655803] [2022-02-15 01:54:52,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:52,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:52,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:52,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:52,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:52,811 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:53,386 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:54:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:53,387 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:54:53,387 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:54:53,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:53,388 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:53,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:54:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 161. [2022-02-15 01:54:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-15 01:54:53,522 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 50 [2022-02-15 01:54:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:53,522 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-15 01:54:53,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-15 01:54:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:54:53,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:53,523 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:53,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2022-02-15 01:54:53,524 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:53,524 INFO L85 PathProgramCache]: Analyzing trace with hash 254764500, now seen corresponding path program 189 times [2022-02-15 01:54:53,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:53,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035411422] [2022-02-15 01:54:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:53,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:53,526 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:53,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:53,527 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:53,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:53,712 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:53,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035411422] [2022-02-15 01:54:53,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035411422] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:53,712 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:53,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:54:53,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216026288] [2022-02-15 01:54:53,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:53,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:54:53,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:53,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:54:53,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:54:53,713 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:54,268 INFO L93 Difference]: Finished difference Result 204 states and 296 transitions. [2022-02-15 01:54:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:54:54,269 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:54:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:54,269 INFO L225 Difference]: With dead ends: 204 [2022-02-15 01:54:54,269 INFO L226 Difference]: Without dead ends: 198 [2022-02-15 01:54:54,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=740, Invalid=1240, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:54:54,269 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:54,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-15 01:54:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 127. [2022-02-15 01:54:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-02-15 01:54:54,362 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 50 [2022-02-15 01:54:54,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:54,362 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-02-15 01:54:54,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-02-15 01:54:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:54:54,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:54,363 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:54,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-02-15 01:54:54,363 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1540922167, now seen corresponding path program 190 times [2022-02-15 01:54:54,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:54,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282079829] [2022-02-15 01:54:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:54,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:54,364 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:54,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:54,365 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:54,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:54,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:54,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282079829] [2022-02-15 01:54:54,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [282079829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:54,577 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:54,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:54:54,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366087389] [2022-02-15 01:54:54,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:54,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:54:54,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:54,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:54:54,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:54:54,578 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:55,092 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2022-02-15 01:54:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:54:55,093 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:54:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:55,093 INFO L225 Difference]: With dead ends: 142 [2022-02-15 01:54:55,093 INFO L226 Difference]: Without dead ends: 136 [2022-02-15 01:54:55,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:54:55,094 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:55,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 21 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-15 01:54:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2022-02-15 01:54:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-02-15 01:54:55,191 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 52 [2022-02-15 01:54:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:55,191 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-02-15 01:54:55,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:55,192 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-02-15 01:54:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:54:55,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:55,192 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:55,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-02-15 01:54:55,192 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:55,192 INFO L85 PathProgramCache]: Analyzing trace with hash 445973175, now seen corresponding path program 191 times [2022-02-15 01:54:55,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:55,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115666958] [2022-02-15 01:54:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:55,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:55,193 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:55,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:55,194 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:55,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:55,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:55,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115666958] [2022-02-15 01:54:55,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115666958] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:55,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:55,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:54:55,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023072793] [2022-02-15 01:54:55,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:55,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:54:55,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:55,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:54:55,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:54:55,398 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:55,908 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2022-02-15 01:54:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:54:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:54:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:55,909 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:54:55,909 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:54:55,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:54:55,910 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:55,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:54:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-02-15 01:54:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2022-02-15 01:54:56,016 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 52 [2022-02-15 01:54:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:56,016 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2022-02-15 01:54:56,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:56,016 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2022-02-15 01:54:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:54:56,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:56,017 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:56,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2022-02-15 01:54:56,017 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash 466979383, now seen corresponding path program 192 times [2022-02-15 01:54:56,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:56,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800881150] [2022-02-15 01:54:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:56,018 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:56,018 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:56,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:56,018 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:56,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:56,222 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:56,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800881150] [2022-02-15 01:54:56,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800881150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:56,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:56,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:54:56,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787246960] [2022-02-15 01:54:56,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:56,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:54:56,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:56,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:54:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:54:56,223 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:56,744 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-15 01:54:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:54:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:54:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:56,745 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:54:56,745 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:54:56,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:54:56,746 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:56,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:56,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:54:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2022-02-15 01:54:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-15 01:54:56,851 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 52 [2022-02-15 01:54:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:56,852 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-15 01:54:56,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-15 01:54:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:54:56,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:56,852 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:56,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2022-02-15 01:54:56,852 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:56,852 INFO L85 PathProgramCache]: Analyzing trace with hash -820891209, now seen corresponding path program 193 times [2022-02-15 01:54:56,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:56,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5612403] [2022-02-15 01:54:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:56,853 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:56,853 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:56,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:56,854 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:57,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:57,053 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:57,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5612403] [2022-02-15 01:54:57,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [5612403] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:57,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:57,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:54:57,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795558111] [2022-02-15 01:54:57,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:57,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:54:57,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:57,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:54:57,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:54:57,054 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:57,576 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-15 01:54:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:54:57,576 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:54:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:57,577 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:54:57,577 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:54:57,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:54:57,577 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:57,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 17 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:54:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2022-02-15 01:54:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-02-15 01:54:57,689 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 52 [2022-02-15 01:54:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:57,689 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-02-15 01:54:57,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-02-15 01:54:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:54:57,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:57,690 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:57,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2022-02-15 01:54:57,690 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:57,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1513948873, now seen corresponding path program 194 times [2022-02-15 01:54:57,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:57,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568412204] [2022-02-15 01:54:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:57,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:57,691 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:57,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:57,692 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:57,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:57,891 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:57,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568412204] [2022-02-15 01:54:57,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [568412204] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:57,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:57,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:54:57,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110520289] [2022-02-15 01:54:57,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:57,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:54:57,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:54:57,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:54:57,892 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:58,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:58,429 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:54:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:54:58,429 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:54:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:58,430 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:54:58,430 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:54:58,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:54:58,430 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:58,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:54:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 141. [2022-02-15 01:54:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-02-15 01:54:58,542 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 52 [2022-02-15 01:54:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:58,543 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-02-15 01:54:58,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-02-15 01:54:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:54:58,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:58,543 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:58,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2022-02-15 01:54:58,543 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1822433097, now seen corresponding path program 195 times [2022-02-15 01:54:58,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:58,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922314471] [2022-02-15 01:54:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:58,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:58,544 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:58,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:58,545 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:58,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:58,745 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:58,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922314471] [2022-02-15 01:54:58,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [922314471] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:58,745 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:58,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:54:58,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845016726] [2022-02-15 01:54:58,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:58,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:54:58,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:54:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:54:58,746 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:54:59,290 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:54:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:54:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:54:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:54:59,291 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:54:59,291 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:54:59,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:54:59,291 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:54:59,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:54:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:54:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 143. [2022-02-15 01:54:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-15 01:54:59,409 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 52 [2022-02-15 01:54:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:54:59,409 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-15 01:54:59,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:54:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-15 01:54:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:54:59,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:54:59,409 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:54:59,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2022-02-15 01:54:59,410 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:54:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:54:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1923028937, now seen corresponding path program 196 times [2022-02-15 01:54:59,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:54:59,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491137185] [2022-02-15 01:54:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:54:59,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:54:59,411 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:54:59,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:54:59,411 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:54:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:59,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:54:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:54:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:54:59,617 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:54:59,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491137185] [2022-02-15 01:54:59,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491137185] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:54:59,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:54:59,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:54:59,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167079884] [2022-02-15 01:54:59,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:54:59,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:54:59,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:54:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:54:59,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:54:59,618 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:00,174 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:55:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:00,175 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:55:00,175 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:55:00,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:00,176 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:00,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:55:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 145. [2022-02-15 01:55:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-15 01:55:00,294 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 52 [2022-02-15 01:55:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:00,294 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-15 01:55:00,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-15 01:55:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:00,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:00,295 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:00,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-02-15 01:55:00,295 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:00,295 INFO L85 PathProgramCache]: Analyzing trace with hash 188616631, now seen corresponding path program 197 times [2022-02-15 01:55:00,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:00,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450592263] [2022-02-15 01:55:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:00,296 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:00,296 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:00,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:00,297 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:00,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:00,499 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:00,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450592263] [2022-02-15 01:55:00,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [450592263] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:00,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:00,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:00,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129699030] [2022-02-15 01:55:00,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:00,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:00,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:00,500 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:01,060 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:55:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:01,061 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:01,061 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:55:01,061 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:55:01,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:01,062 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:01,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:55:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2022-02-15 01:55:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-15 01:55:01,190 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 52 [2022-02-15 01:55:01,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:01,191 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-15 01:55:01,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-15 01:55:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:01,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:01,191 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:01,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-02-15 01:55:01,191 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:01,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2039523529, now seen corresponding path program 198 times [2022-02-15 01:55:01,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:01,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412067400] [2022-02-15 01:55:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:01,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:01,192 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:01,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:01,193 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:01,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:01,405 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:01,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412067400] [2022-02-15 01:55:01,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412067400] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:01,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:01,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:01,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349225173] [2022-02-15 01:55:01,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:01,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:01,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:01,406 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:01,972 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:55:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:01,972 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:01,973 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:55:01,973 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:55:01,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:01,973 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:01,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:55:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 149. [2022-02-15 01:55:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-15 01:55:02,102 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 52 [2022-02-15 01:55:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:02,102 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-15 01:55:02,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-15 01:55:02,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:02,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:02,102 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:02,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-02-15 01:55:02,103 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash -93536585, now seen corresponding path program 199 times [2022-02-15 01:55:02,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:02,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541096832] [2022-02-15 01:55:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:02,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:02,104 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:02,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:02,104 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:02,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:02,305 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:02,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541096832] [2022-02-15 01:55:02,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541096832] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:02,305 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:02,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:02,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273537923] [2022-02-15 01:55:02,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:02,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:02,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:02,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:02,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:02,306 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:02,881 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:55:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:02,882 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:02,882 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:55:02,882 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:55:02,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:02,882 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:02,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:55:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 151. [2022-02-15 01:55:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-15 01:55:03,014 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 52 [2022-02-15 01:55:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:03,014 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-15 01:55:03,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:03,014 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-15 01:55:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:03,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:03,014 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:03,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2022-02-15 01:55:03,014 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1689142839, now seen corresponding path program 200 times [2022-02-15 01:55:03,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:03,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526372007] [2022-02-15 01:55:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:03,015 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:03,016 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:03,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:03,016 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:03,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:03,215 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:03,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526372007] [2022-02-15 01:55:03,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [526372007] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:03,215 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:03,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:03,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198484507] [2022-02-15 01:55:03,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:03,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:03,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:03,216 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:03,795 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:55:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:03,796 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:03,807 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:55:03,807 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:55:03,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:03,808 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:03,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 15 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:55:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 153. [2022-02-15 01:55:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-15 01:55:03,945 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 52 [2022-02-15 01:55:03,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:03,946 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-15 01:55:03,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:03,946 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-15 01:55:03,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:03,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:03,946 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:03,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2022-02-15 01:55:03,946 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1152118199, now seen corresponding path program 201 times [2022-02-15 01:55:03,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:03,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485659997] [2022-02-15 01:55:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:03,947 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:03,947 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:03,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:03,948 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:04,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:04,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:04,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485659997] [2022-02-15 01:55:04,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [485659997] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:04,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:04,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:04,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845294676] [2022-02-15 01:55:04,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:04,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:04,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:04,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:04,149 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:04,744 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:55:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:04,744 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:04,747 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:55:04,747 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:55:04,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:04,747 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:04,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:04,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:55:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 155. [2022-02-15 01:55:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-15 01:55:04,886 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 52 [2022-02-15 01:55:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:04,886 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-15 01:55:04,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-15 01:55:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:04,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:04,887 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:04,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2022-02-15 01:55:04,887 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 467514679, now seen corresponding path program 202 times [2022-02-15 01:55:04,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:04,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76301496] [2022-02-15 01:55:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:04,888 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:04,888 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:04,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:04,889 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:05,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:05,089 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:05,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76301496] [2022-02-15 01:55:05,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [76301496] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:05,090 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:05,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:05,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877915320] [2022-02-15 01:55:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:05,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:05,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:05,090 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:05,690 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:55:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:05,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:05,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:05,691 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:55:05,691 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:55:05,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:05,691 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:05,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:05,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:55:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 157. [2022-02-15 01:55:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-15 01:55:05,833 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 52 [2022-02-15 01:55:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:05,833 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-15 01:55:05,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-15 01:55:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:05,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:05,834 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:05,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2022-02-15 01:55:05,834 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash -306471753, now seen corresponding path program 203 times [2022-02-15 01:55:05,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:05,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43085029] [2022-02-15 01:55:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:05,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:05,835 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:05,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:05,836 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:06,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:06,045 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:06,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43085029] [2022-02-15 01:55:06,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [43085029] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:06,045 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:06,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:06,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904552682] [2022-02-15 01:55:06,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:06,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:06,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:06,045 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:06,662 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:55:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:06,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:06,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:06,663 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:55:06,663 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:55:06,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:06,663 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:06,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 25 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:06,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:55:06,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 159. [2022-02-15 01:55:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-15 01:55:06,809 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 52 [2022-02-15 01:55:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:06,809 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-15 01:55:06,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-15 01:55:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:06,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:06,809 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:06,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2022-02-15 01:55:06,809 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1078090697, now seen corresponding path program 204 times [2022-02-15 01:55:06,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:06,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120174534] [2022-02-15 01:55:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:06,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:06,811 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:06,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:06,811 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:07,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:07,011 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:07,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120174534] [2022-02-15 01:55:07,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [120174534] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:07,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:07,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:07,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198225406] [2022-02-15 01:55:07,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:07,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:07,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:07,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:07,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:07,012 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:07,629 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:55:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:07,629 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:07,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:07,630 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:55:07,630 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:55:07,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:07,630 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:07,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:55:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 161. [2022-02-15 01:55:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-15 01:55:07,776 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 52 [2022-02-15 01:55:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:07,776 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-15 01:55:07,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-15 01:55:07,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:07,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:07,777 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:07,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2022-02-15 01:55:07,777 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:07,777 INFO L85 PathProgramCache]: Analyzing trace with hash 425446327, now seen corresponding path program 205 times [2022-02-15 01:55:07,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:07,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475401214] [2022-02-15 01:55:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:07,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:07,778 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:07,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:07,779 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:07,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:07,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:07,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475401214] [2022-02-15 01:55:07,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [475401214] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:07,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:07,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:07,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585801065] [2022-02-15 01:55:07,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:07,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:07,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:07,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:07,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:07,981 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:08,608 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:55:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:08,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:08,608 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:55:08,609 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:55:08,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:08,609 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:08,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:55:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 163. [2022-02-15 01:55:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-15 01:55:08,757 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 52 [2022-02-15 01:55:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:08,757 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-15 01:55:08,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-15 01:55:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:08,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:08,758 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:08,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2022-02-15 01:55:08,758 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:08,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2079452361, now seen corresponding path program 206 times [2022-02-15 01:55:08,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:08,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779950135] [2022-02-15 01:55:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:08,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:08,759 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:08,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:08,759 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:08,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:08,968 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:08,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779950135] [2022-02-15 01:55:08,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [779950135] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:08,968 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:08,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:08,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713709036] [2022-02-15 01:55:08,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:08,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:08,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:08,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:08,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:08,969 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:09,603 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:55:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:09,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:09,604 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:55:09,604 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:55:09,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:09,604 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:09,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:55:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 165. [2022-02-15 01:55:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-15 01:55:09,757 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 52 [2022-02-15 01:55:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:09,757 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-15 01:55:09,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-15 01:55:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:09,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:09,757 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:09,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2022-02-15 01:55:09,758 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash 189561527, now seen corresponding path program 207 times [2022-02-15 01:55:09,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:09,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388475537] [2022-02-15 01:55:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:09,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:09,759 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:09,759 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:09,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:09,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:09,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388475537] [2022-02-15 01:55:09,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388475537] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:09,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:09,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:09,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061006581] [2022-02-15 01:55:09,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:09,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:09,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:09,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:09,963 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:10,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:10,595 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 01:55:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:10,596 INFO L225 Difference]: With dead ends: 242 [2022-02-15 01:55:10,596 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:55:10,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:10,596 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:10,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 23 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:55:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 167. [2022-02-15 01:55:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-15 01:55:10,745 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 52 [2022-02-15 01:55:10,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:10,745 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-15 01:55:10,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-15 01:55:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:10,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:10,745 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:10,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2022-02-15 01:55:10,745 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:10,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1131478473, now seen corresponding path program 208 times [2022-02-15 01:55:10,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:10,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246691213] [2022-02-15 01:55:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:10,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:10,747 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:10,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:10,747 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:10,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:10,951 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:10,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246691213] [2022-02-15 01:55:10,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [246691213] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:10,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:10,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:10,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236468889] [2022-02-15 01:55:10,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:10,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:10,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:10,952 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:11,592 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 01:55:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:11,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:11,593 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:55:11,593 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:55:11,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:11,593 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:11,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:55:11,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 169. [2022-02-15 01:55:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-15 01:55:11,756 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 52 [2022-02-15 01:55:11,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:11,756 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-15 01:55:11,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-15 01:55:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:55:11,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:11,757 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:11,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2022-02-15 01:55:11,757 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:11,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:11,757 INFO L85 PathProgramCache]: Analyzing trace with hash 659401143, now seen corresponding path program 209 times [2022-02-15 01:55:11,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:11,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859129555] [2022-02-15 01:55:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:11,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:11,760 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:11,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:11,760 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:11,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:11,984 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:11,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859129555] [2022-02-15 01:55:11,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1859129555] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:11,984 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:11,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:55:11,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835082919] [2022-02-15 01:55:11,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:11,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:55:11,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:11,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:55:11,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:55:11,985 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:12,575 INFO L93 Difference]: Finished difference Result 214 states and 311 transitions. [2022-02-15 01:55:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:55:12,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:55:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:12,576 INFO L225 Difference]: With dead ends: 214 [2022-02-15 01:55:12,576 INFO L226 Difference]: Without dead ends: 208 [2022-02-15 01:55:12,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=808, Invalid=1354, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:55:12,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:12,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 19 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-15 01:55:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 133. [2022-02-15 01:55:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-02-15 01:55:12,682 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 52 [2022-02-15 01:55:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:12,682 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-02-15 01:55:12,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-02-15 01:55:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:12,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:12,682 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:12,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2022-02-15 01:55:12,682 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:12,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:12,683 INFO L85 PathProgramCache]: Analyzing trace with hash 801286874, now seen corresponding path program 210 times [2022-02-15 01:55:12,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:12,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102402151] [2022-02-15 01:55:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:12,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:12,684 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:12,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:12,684 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:12,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:12,911 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:12,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102402151] [2022-02-15 01:55:12,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102402151] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:12,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:12,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:12,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317551890] [2022-02-15 01:55:12,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:12,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:12,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:12,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:12,912 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:13,468 INFO L93 Difference]: Finished difference Result 148 states and 213 transitions. [2022-02-15 01:55:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:13,468 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:13,469 INFO L225 Difference]: With dead ends: 148 [2022-02-15 01:55:13,469 INFO L226 Difference]: Without dead ends: 142 [2022-02-15 01:55:13,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:13,469 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:13,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 23 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-15 01:55:13,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 137. [2022-02-15 01:55:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2022-02-15 01:55:13,582 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 54 [2022-02-15 01:55:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:13,582 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2022-02-15 01:55:13,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2022-02-15 01:55:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:13,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:13,583 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:13,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2022-02-15 01:55:13,583 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:13,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash -293662118, now seen corresponding path program 211 times [2022-02-15 01:55:13,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:13,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069313957] [2022-02-15 01:55:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:13,584 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:13,584 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:13,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:13,585 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:13,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:13,798 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:13,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069313957] [2022-02-15 01:55:13,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1069313957] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:13,798 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:13,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:13,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511242665] [2022-02-15 01:55:13,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:13,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:13,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:13,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:13,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:13,799 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:14,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:14,356 INFO L93 Difference]: Finished difference Result 152 states and 218 transitions. [2022-02-15 01:55:14,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:14,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:14,357 INFO L225 Difference]: With dead ends: 152 [2022-02-15 01:55:14,357 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:55:14,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:14,358 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:14,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 19 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:55:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2022-02-15 01:55:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-02-15 01:55:14,476 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 54 [2022-02-15 01:55:14,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:14,476 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-02-15 01:55:14,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:14,476 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-02-15 01:55:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:14,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:14,477 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:14,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2022-02-15 01:55:14,477 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash -272655910, now seen corresponding path program 212 times [2022-02-15 01:55:14,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:14,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819866007] [2022-02-15 01:55:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:14,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:14,478 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:14,478 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:14,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:14,694 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:14,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819866007] [2022-02-15 01:55:14,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819866007] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:14,694 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:14,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:14,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770092109] [2022-02-15 01:55:14,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:14,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:14,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:14,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:14,695 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:15,252 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-15 01:55:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:15,252 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:15,253 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:55:15,253 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:55:15,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:15,253 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:15,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:55:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2022-02-15 01:55:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-15 01:55:15,378 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 54 [2022-02-15 01:55:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:15,378 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-15 01:55:15,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-15 01:55:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:15,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:15,379 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:15,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2022-02-15 01:55:15,379 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1560526502, now seen corresponding path program 213 times [2022-02-15 01:55:15,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:15,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159718722] [2022-02-15 01:55:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:15,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:15,380 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:15,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:15,381 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:15,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:15,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:15,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159718722] [2022-02-15 01:55:15,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159718722] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:15,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:15,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:15,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849742453] [2022-02-15 01:55:15,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:15,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:15,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:15,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:15,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:15,601 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:16,177 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:55:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:16,178 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:16,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:16,178 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:55:16,178 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:55:16,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:16,179 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:16,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:55:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 145. [2022-02-15 01:55:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-15 01:55:16,305 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 54 [2022-02-15 01:55:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:16,305 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-15 01:55:16,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-15 01:55:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:16,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:16,305 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:16,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2022-02-15 01:55:16,306 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:16,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2041383130, now seen corresponding path program 214 times [2022-02-15 01:55:16,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:16,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229998634] [2022-02-15 01:55:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:16,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:16,307 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:16,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:16,307 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:16,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:16,523 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:16,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229998634] [2022-02-15 01:55:16,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [229998634] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:16,523 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:16,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:16,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391199514] [2022-02-15 01:55:16,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:16,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:16,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:16,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:16,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:16,524 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:17,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:17,117 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:55:17,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:17,117 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:17,118 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:55:17,118 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:55:17,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:17,118 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:17,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:55:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2022-02-15 01:55:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-15 01:55:17,246 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 54 [2022-02-15 01:55:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:17,246 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-15 01:55:17,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-15 01:55:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:17,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:17,246 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:17,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2022-02-15 01:55:17,246 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:17,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898906, now seen corresponding path program 215 times [2022-02-15 01:55:17,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:17,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348396075] [2022-02-15 01:55:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:17,248 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:17,248 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:17,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:17,248 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:17,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:17,462 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:17,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348396075] [2022-02-15 01:55:17,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [348396075] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:17,462 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:17,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:17,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659258016] [2022-02-15 01:55:17,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:17,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:17,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:17,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:17,463 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:18,048 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:55:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:18,048 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:18,049 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:55:18,049 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:55:18,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:18,049 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:18,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:55:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 149. [2022-02-15 01:55:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-15 01:55:18,184 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 54 [2022-02-15 01:55:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:18,184 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-15 01:55:18,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-15 01:55:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:18,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:18,184 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:18,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2022-02-15 01:55:18,184 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:18,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1632303066, now seen corresponding path program 216 times [2022-02-15 01:55:18,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:18,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232708312] [2022-02-15 01:55:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:18,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:18,186 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:18,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:18,186 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:18,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:18,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:18,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232708312] [2022-02-15 01:55:18,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232708312] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:18,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:18,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:18,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091954083] [2022-02-15 01:55:18,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:18,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:18,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:18,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:18,401 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:18,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:18,994 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:55:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:18,995 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:18,995 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:55:18,995 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:55:18,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:18,995 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:18,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:55:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2022-02-15 01:55:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:19,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-15 01:55:19,133 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 54 [2022-02-15 01:55:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:19,133 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-15 01:55:19,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-15 01:55:19,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:19,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:19,134 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:19,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2022-02-15 01:55:19,134 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:19,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:19,134 INFO L85 PathProgramCache]: Analyzing trace with hash -551018662, now seen corresponding path program 217 times [2022-02-15 01:55:19,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:19,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827689108] [2022-02-15 01:55:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:19,135 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:19,135 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:19,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:19,135 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:19,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:19,350 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:19,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827689108] [2022-02-15 01:55:19,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [827689108] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:19,350 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:19,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:19,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814113576] [2022-02-15 01:55:19,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:19,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:19,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:19,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:19,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:19,351 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:19,966 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:55:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:19,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:19,966 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:55:19,966 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:55:19,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:19,967 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:19,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:55:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2022-02-15 01:55:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-15 01:55:20,108 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 54 [2022-02-15 01:55:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:20,108 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-15 01:55:20,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-15 01:55:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:20,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:20,108 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:20,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2022-02-15 01:55:20,108 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:20,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1515808474, now seen corresponding path program 218 times [2022-02-15 01:55:20,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:20,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982229247] [2022-02-15 01:55:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:20,110 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:20,110 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:20,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:20,110 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:20,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:20,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:20,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982229247] [2022-02-15 01:55:20,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [982229247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:20,338 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:20,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:20,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037082319] [2022-02-15 01:55:20,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:20,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:20,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:20,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:20,338 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:20,952 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:55:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:20,953 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:20,953 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:55:20,953 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:55:20,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:20,954 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:20,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:55:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 155. [2022-02-15 01:55:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-15 01:55:21,101 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 54 [2022-02-15 01:55:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:21,101 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-15 01:55:21,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-15 01:55:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:21,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:21,102 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:21,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2022-02-15 01:55:21,102 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:21,102 INFO L85 PathProgramCache]: Analyzing trace with hash -833171878, now seen corresponding path program 219 times [2022-02-15 01:55:21,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:21,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355351686] [2022-02-15 01:55:21,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:21,103 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:21,103 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:21,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:21,104 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:21,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:21,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:21,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355351686] [2022-02-15 01:55:21,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [355351686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:21,320 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:21,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:21,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024662996] [2022-02-15 01:55:21,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:21,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:21,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:21,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:21,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:21,321 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:21,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:21,949 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:55:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:21,950 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:55:21,950 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:55:21,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:21,950 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:21,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:55:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 157. [2022-02-15 01:55:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-15 01:55:22,101 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 54 [2022-02-15 01:55:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:22,101 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-15 01:55:22,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-15 01:55:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:22,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:22,101 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:22,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2022-02-15 01:55:22,102 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:22,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:22,102 INFO L85 PathProgramCache]: Analyzing trace with hash 949507546, now seen corresponding path program 220 times [2022-02-15 01:55:22,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:22,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855218825] [2022-02-15 01:55:22,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:22,103 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:22,103 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:22,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:22,103 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:22,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:22,327 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:22,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855218825] [2022-02-15 01:55:22,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855218825] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:22,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:22,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:22,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635526565] [2022-02-15 01:55:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:22,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:22,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:22,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:22,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:22,328 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:22,968 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:55:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:22,968 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:22,969 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:55:22,969 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:55:22,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:22,969 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:22,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:22,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:55:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2022-02-15 01:55:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-15 01:55:23,122 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 54 [2022-02-15 01:55:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:23,122 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-15 01:55:23,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-15 01:55:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:23,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:23,123 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:23,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2022-02-15 01:55:23,123 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:23,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:23,123 INFO L85 PathProgramCache]: Analyzing trace with hash 412482906, now seen corresponding path program 221 times [2022-02-15 01:55:23,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:23,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732874916] [2022-02-15 01:55:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:23,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:23,124 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:23,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:23,125 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:23,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:23,356 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:23,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732874916] [2022-02-15 01:55:23,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [732874916] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:23,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:23,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:23,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208896742] [2022-02-15 01:55:23,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:23,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:23,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:23,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:23,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:23,357 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:24,001 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:55:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:24,002 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:55:24,002 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:55:24,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:24,002 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:24,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:55:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 161. [2022-02-15 01:55:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-15 01:55:24,157 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 54 [2022-02-15 01:55:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:24,157 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-15 01:55:24,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-15 01:55:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:24,158 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:24,158 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:24,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2022-02-15 01:55:24,158 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:24,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:24,158 INFO L85 PathProgramCache]: Analyzing trace with hash -272120614, now seen corresponding path program 222 times [2022-02-15 01:55:24,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:24,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211525963] [2022-02-15 01:55:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:24,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:24,159 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:24,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:24,160 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:24,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:24,374 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:24,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211525963] [2022-02-15 01:55:24,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211525963] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:24,374 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:24,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:24,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427905619] [2022-02-15 01:55:24,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:24,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:24,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:24,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:24,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:24,375 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:25,041 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:55:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:25,042 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:55:25,042 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:55:25,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:25,043 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:25,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:25,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:55:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 163. [2022-02-15 01:55:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-15 01:55:25,199 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 54 [2022-02-15 01:55:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:25,199 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-15 01:55:25,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-15 01:55:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:25,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:25,199 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:25,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2022-02-15 01:55:25,199 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:25,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1046107046, now seen corresponding path program 223 times [2022-02-15 01:55:25,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:25,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645164478] [2022-02-15 01:55:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:25,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:25,201 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:25,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:25,201 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:25,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:25,415 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:25,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645164478] [2022-02-15 01:55:25,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [645164478] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:25,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:25,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:25,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190768674] [2022-02-15 01:55:25,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:25,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:25,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:25,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:25,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:25,416 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:26,082 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:55:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:26,082 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:26,083 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:55:26,083 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:55:26,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:26,083 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:26,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:55:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 165. [2022-02-15 01:55:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-15 01:55:26,251 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 54 [2022-02-15 01:55:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:26,251 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-15 01:55:26,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-15 01:55:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:26,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:26,252 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:26,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2022-02-15 01:55:26,252 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1817725990, now seen corresponding path program 224 times [2022-02-15 01:55:26,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:26,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574578488] [2022-02-15 01:55:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:26,253 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:26,253 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:26,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:26,254 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:26,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:26,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:26,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574578488] [2022-02-15 01:55:26,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [574578488] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:26,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:26,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:26,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678836804] [2022-02-15 01:55:26,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:26,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:26,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:26,469 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:27,148 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:55:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:27,149 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:55:27,149 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:55:27,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:27,150 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:27,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:55:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 167. [2022-02-15 01:55:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-15 01:55:27,316 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 54 [2022-02-15 01:55:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:27,316 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-15 01:55:27,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-15 01:55:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:27,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:27,317 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:27,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2022-02-15 01:55:27,317 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:27,317 INFO L85 PathProgramCache]: Analyzing trace with hash -314188966, now seen corresponding path program 225 times [2022-02-15 01:55:27,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:27,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821357781] [2022-02-15 01:55:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:27,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:27,318 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:27,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:27,319 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:27,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:27,533 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:27,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821357781] [2022-02-15 01:55:27,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [821357781] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:27,533 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:27,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:27,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678799984] [2022-02-15 01:55:27,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:27,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:27,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:27,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:27,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:27,534 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:28,212 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:55:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:28,212 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:28,213 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:55:28,213 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:55:28,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:28,213 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:28,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:55:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 169. [2022-02-15 01:55:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:28,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-15 01:55:28,381 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 54 [2022-02-15 01:55:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:28,381 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-15 01:55:28,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-15 01:55:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:28,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:28,382 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:28,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2022-02-15 01:55:28,382 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1475879642, now seen corresponding path program 226 times [2022-02-15 01:55:28,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:28,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687634434] [2022-02-15 01:55:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:28,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:28,383 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:28,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:28,384 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:28,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:28,602 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:28,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687634434] [2022-02-15 01:55:28,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [687634434] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:28,602 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:28,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:28,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583817047] [2022-02-15 01:55:28,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:28,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:28,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:28,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:28,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:28,603 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:29,289 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 01:55:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:29,290 INFO L225 Difference]: With dead ends: 242 [2022-02-15 01:55:29,290 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:55:29,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:29,291 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:29,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 21 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:55:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2022-02-15 01:55:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:29,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-15 01:55:29,462 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 54 [2022-02-15 01:55:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:29,462 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-15 01:55:29,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-15 01:55:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:29,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:29,463 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:29,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2022-02-15 01:55:29,463 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:29,463 INFO L85 PathProgramCache]: Analyzing trace with hash -550073766, now seen corresponding path program 227 times [2022-02-15 01:55:29,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:29,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80619995] [2022-02-15 01:55:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:29,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:29,464 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:29,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:29,465 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:29,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:29,681 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:29,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80619995] [2022-02-15 01:55:29,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [80619995] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:29,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:29,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:29,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709445606] [2022-02-15 01:55:29,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:29,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:29,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:29,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:29,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:29,682 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:30,380 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 01:55:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:30,381 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:55:30,381 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:55:30,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:30,381 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:30,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:55:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 173. [2022-02-15 01:55:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-15 01:55:30,555 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 54 [2022-02-15 01:55:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:30,555 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-15 01:55:30,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-15 01:55:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:30,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:30,555 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:30,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2022-02-15 01:55:30,555 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1871113766, now seen corresponding path program 228 times [2022-02-15 01:55:30,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:30,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406466031] [2022-02-15 01:55:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:30,557 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:30,557 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:30,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:30,557 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:30,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:30,774 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:30,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406466031] [2022-02-15 01:55:30,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406466031] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:30,774 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:30,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:30,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593143163] [2022-02-15 01:55:30,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:30,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:30,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:30,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:30,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:30,775 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:31,479 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 01:55:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:31,479 INFO L225 Difference]: With dead ends: 254 [2022-02-15 01:55:31,480 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:55:31,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:31,480 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:31,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:55:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 175. [2022-02-15 01:55:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-15 01:55:31,654 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 54 [2022-02-15 01:55:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:31,654 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-15 01:55:31,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-15 01:55:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:31,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:31,654 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:31,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2022-02-15 01:55:31,654 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash -80234150, now seen corresponding path program 229 times [2022-02-15 01:55:31,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:31,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141888954] [2022-02-15 01:55:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:31,656 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:31,656 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:31,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:31,657 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:31,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:31,879 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:31,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141888954] [2022-02-15 01:55:31,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [141888954] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:31,879 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:31,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:31,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820787324] [2022-02-15 01:55:31,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:31,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:31,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:31,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:31,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:31,880 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:32,608 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 01:55:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:32,609 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:55:32,609 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 01:55:32,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:32,610 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:32,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 17 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 01:55:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 177. [2022-02-15 01:55:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-15 01:55:32,804 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 54 [2022-02-15 01:55:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:32,804 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-15 01:55:32,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-15 01:55:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:55:32,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:32,804 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:32,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2022-02-15 01:55:32,804 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1326808870, now seen corresponding path program 230 times [2022-02-15 01:55:32,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:32,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806579782] [2022-02-15 01:55:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:32,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:32,806 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:32,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:32,806 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:33,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:33,027 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:33,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806579782] [2022-02-15 01:55:33,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [806579782] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:33,027 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:33,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:55:33,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784248810] [2022-02-15 01:55:33,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:33,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:55:33,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:33,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:55:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:55:33,028 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:33,706 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:55:33,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:55:33,706 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:55:33,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:33,707 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:55:33,707 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:55:33,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:55:33,707 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:33,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:33,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:55:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 139. [2022-02-15 01:55:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2022-02-15 01:55:33,833 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 54 [2022-02-15 01:55:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:33,833 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2022-02-15 01:55:33,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2022-02-15 01:55:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:33,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:33,833 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:33,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2022-02-15 01:55:33,833 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:33,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1318625859, now seen corresponding path program 231 times [2022-02-15 01:55:33,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:33,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210569671] [2022-02-15 01:55:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:33,834 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:33,834 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:33,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:33,835 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:34,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:34,077 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:34,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210569671] [2022-02-15 01:55:34,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [210569671] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:34,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:34,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:34,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67761273] [2022-02-15 01:55:34,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:34,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:34,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:34,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:34,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:34,078 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:34,699 INFO L93 Difference]: Finished difference Result 154 states and 222 transitions. [2022-02-15 01:55:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:34,699 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:34,700 INFO L225 Difference]: With dead ends: 154 [2022-02-15 01:55:34,700 INFO L226 Difference]: Without dead ends: 148 [2022-02-15 01:55:34,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:34,700 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:34,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 25 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-15 01:55:34,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2022-02-15 01:55:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2022-02-15 01:55:34,834 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 56 [2022-02-15 01:55:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:34,834 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2022-02-15 01:55:34,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2022-02-15 01:55:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:34,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:34,834 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:34,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2022-02-15 01:55:34,834 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1881392445, now seen corresponding path program 232 times [2022-02-15 01:55:34,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:34,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009541312] [2022-02-15 01:55:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:34,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:34,836 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:34,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:34,836 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:35,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:35,072 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:35,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009541312] [2022-02-15 01:55:35,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2009541312] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:35,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:35,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:35,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004406539] [2022-02-15 01:55:35,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:35,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:35,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:35,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:35,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:35,073 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:35,696 INFO L93 Difference]: Finished difference Result 158 states and 227 transitions. [2022-02-15 01:55:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:35,697 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:55:35,697 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:55:35,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:35,697 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:35,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:55:35,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2022-02-15 01:55:35,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2022-02-15 01:55:35,835 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 56 [2022-02-15 01:55:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:35,836 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2022-02-15 01:55:35,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2022-02-15 01:55:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:35,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:35,836 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:35,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2022-02-15 01:55:35,836 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:35,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:35,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1902398653, now seen corresponding path program 233 times [2022-02-15 01:55:35,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:35,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440278992] [2022-02-15 01:55:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:35,837 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:35,837 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:35,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:35,838 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:36,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:36,070 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:36,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440278992] [2022-02-15 01:55:36,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [440278992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:36,070 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:36,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:36,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081233591] [2022-02-15 01:55:36,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:36,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:36,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:36,071 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:36,678 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:55:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:36,679 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:36,679 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:55:36,679 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:55:36,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:36,680 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:36,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:55:36,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2022-02-15 01:55:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-15 01:55:36,821 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 56 [2022-02-15 01:55:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:36,821 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-15 01:55:36,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-15 01:55:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:36,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:36,822 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:36,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2022-02-15 01:55:36,822 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash 614528061, now seen corresponding path program 234 times [2022-02-15 01:55:36,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:36,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508732272] [2022-02-15 01:55:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:36,823 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:36,823 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:36,824 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:37,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:37,056 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:37,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508732272] [2022-02-15 01:55:37,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [508732272] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:37,056 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:37,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:37,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805448722] [2022-02-15 01:55:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:37,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:37,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:37,057 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:37,686 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:55:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:37,686 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:37,687 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:55:37,687 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:55:37,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:37,687 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:37,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:37,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:55:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2022-02-15 01:55:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-15 01:55:37,830 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 56 [2022-02-15 01:55:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:37,830 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-15 01:55:37,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-15 01:55:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:37,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:37,830 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:37,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2022-02-15 01:55:37,831 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash -78529603, now seen corresponding path program 235 times [2022-02-15 01:55:37,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:37,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648727748] [2022-02-15 01:55:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:37,832 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:37,832 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:37,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:37,832 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:38,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:38,067 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:38,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648727748] [2022-02-15 01:55:38,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1648727748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:38,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:38,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:38,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757268344] [2022-02-15 01:55:38,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:38,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:38,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:38,068 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:38,694 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:55:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:38,694 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:38,695 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:55:38,695 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:55:38,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:38,695 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:38,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:38,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:55:38,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2022-02-15 01:55:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-15 01:55:38,847 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 56 [2022-02-15 01:55:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:38,847 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-15 01:55:38,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-15 01:55:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:38,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:38,847 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:38,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2022-02-15 01:55:38,847 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:38,848 INFO L85 PathProgramCache]: Analyzing trace with hash -387013827, now seen corresponding path program 236 times [2022-02-15 01:55:38,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:38,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927233519] [2022-02-15 01:55:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:38,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:38,849 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:38,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:38,849 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:39,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:39,077 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:39,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927233519] [2022-02-15 01:55:39,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927233519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:39,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:39,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:39,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462705205] [2022-02-15 01:55:39,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:39,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:39,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:39,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:39,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:39,078 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:39,722 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:55:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:39,723 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:39,723 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:55:39,723 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:55:39,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:39,724 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:39,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:55:39,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 155. [2022-02-15 01:55:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-15 01:55:39,875 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 56 [2022-02-15 01:55:39,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:39,875 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-15 01:55:39,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-15 01:55:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:39,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:39,876 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:39,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2022-02-15 01:55:39,876 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:39,876 INFO L85 PathProgramCache]: Analyzing trace with hash -487609667, now seen corresponding path program 237 times [2022-02-15 01:55:39,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:39,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951471396] [2022-02-15 01:55:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:39,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:39,877 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:39,878 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:40,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:40,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:40,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951471396] [2022-02-15 01:55:40,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1951471396] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:40,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:40,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:40,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445550138] [2022-02-15 01:55:40,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:40,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:40,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:40,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:40,109 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:40,760 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:55:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:40,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:40,761 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:55:40,761 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:55:40,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:40,761 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:40,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:40,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:55:40,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 157. [2022-02-15 01:55:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-15 01:55:40,917 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 56 [2022-02-15 01:55:40,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:40,917 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-15 01:55:40,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:40,918 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-15 01:55:40,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:40,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:40,918 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:40,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2022-02-15 01:55:40,918 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:40,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1624035901, now seen corresponding path program 238 times [2022-02-15 01:55:40,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:40,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39053911] [2022-02-15 01:55:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:40,919 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:40,919 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:40,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:40,920 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:41,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:41,152 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:41,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39053911] [2022-02-15 01:55:41,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [39053911] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:41,152 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:41,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:41,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135014655] [2022-02-15 01:55:41,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:41,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:41,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:41,153 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:41,824 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:55:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:41,824 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:41,825 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:55:41,825 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:55:41,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:41,825 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:41,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:55:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 159. [2022-02-15 01:55:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-15 01:55:41,984 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 56 [2022-02-15 01:55:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:41,984 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-15 01:55:41,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-15 01:55:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:41,984 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:41,984 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:41,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2022-02-15 01:55:41,984 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:41,985 INFO L85 PathProgramCache]: Analyzing trace with hash -604104259, now seen corresponding path program 239 times [2022-02-15 01:55:41,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:41,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152122631] [2022-02-15 01:55:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:41,985 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:41,986 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:41,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:41,986 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:42,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:42,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:42,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152122631] [2022-02-15 01:55:42,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [152122631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:42,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:42,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:42,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408259599] [2022-02-15 01:55:42,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:42,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:42,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:42,218 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:42,888 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:55:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:42,888 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:55:42,888 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:55:42,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:42,889 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:42,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:55:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 161. [2022-02-15 01:55:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-15 01:55:43,050 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 56 [2022-02-15 01:55:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:43,050 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-15 01:55:43,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-15 01:55:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:43,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:43,050 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:43,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2022-02-15 01:55:43,050 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:43,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1341882685, now seen corresponding path program 240 times [2022-02-15 01:55:43,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:43,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516614933] [2022-02-15 01:55:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:43,051 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:43,052 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:43,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:43,052 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:43,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:43,284 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:43,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516614933] [2022-02-15 01:55:43,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516614933] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:43,284 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:43,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:43,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787492253] [2022-02-15 01:55:43,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:43,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:43,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:43,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:43,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:43,285 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:43,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:43,976 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:55:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:43,976 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:43,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:43,976 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:55:43,977 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:55:43,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:43,977 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:43,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 17 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:55:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 163. [2022-02-15 01:55:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-15 01:55:44,145 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 56 [2022-02-15 01:55:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:44,145 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-15 01:55:44,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-15 01:55:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:44,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:44,145 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:44,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2022-02-15 01:55:44,145 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1170405187, now seen corresponding path program 241 times [2022-02-15 01:55:44,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:44,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470011352] [2022-02-15 01:55:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:44,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:44,146 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:44,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:44,147 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:44,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:44,378 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:44,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470011352] [2022-02-15 01:55:44,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470011352] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:44,378 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:44,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:44,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130848477] [2022-02-15 01:55:44,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:44,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:44,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:44,379 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:45,073 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:55:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:45,074 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:45,074 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:55:45,074 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:55:45,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:45,075 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:45,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:55:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2022-02-15 01:55:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-15 01:55:45,246 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 56 [2022-02-15 01:55:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:45,246 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-15 01:55:45,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-15 01:55:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:45,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:45,247 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:45,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2022-02-15 01:55:45,247 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1707429827, now seen corresponding path program 242 times [2022-02-15 01:55:45,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:45,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550149123] [2022-02-15 01:55:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:45,248 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:45,248 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:45,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:45,249 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:45,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:45,485 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:45,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550149123] [2022-02-15 01:55:45,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [550149123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:45,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:45,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:45,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661605934] [2022-02-15 01:55:45,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:45,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:45,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:45,486 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:46,191 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:55:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:46,191 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:46,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:46,192 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:55:46,192 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:55:46,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:46,192 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:46,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:55:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2022-02-15 01:55:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:46,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-15 01:55:46,368 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 56 [2022-02-15 01:55:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:46,368 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-15 01:55:46,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-15 01:55:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:46,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:46,368 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:46,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2022-02-15 01:55:46,368 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:46,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1902933949, now seen corresponding path program 243 times [2022-02-15 01:55:46,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:46,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545069036] [2022-02-15 01:55:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:46,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:46,370 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:46,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:46,370 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:46,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:46,606 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:46,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545069036] [2022-02-15 01:55:46,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [545069036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:46,606 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:46,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:46,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624420459] [2022-02-15 01:55:46,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:46,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:46,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:46,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:46,607 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:47,318 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:55:47,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:47,318 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:47,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:47,318 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:55:47,318 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:55:47,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:47,319 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:47,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 25 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:55:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2022-02-15 01:55:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-15 01:55:47,499 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 56 [2022-02-15 01:55:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:47,499 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-15 01:55:47,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-15 01:55:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:47,499 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:47,499 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:47,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2022-02-15 01:55:47,499 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1128947517, now seen corresponding path program 244 times [2022-02-15 01:55:47,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:47,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317357361] [2022-02-15 01:55:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:47,501 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:47,501 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:47,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:47,501 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:47,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:47,749 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:47,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317357361] [2022-02-15 01:55:47,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317357361] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:47,749 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:47,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:47,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641685544] [2022-02-15 01:55:47,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:47,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:47,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:47,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:47,750 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:48,479 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:55:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:48,480 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:48,480 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:55:48,480 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:55:48,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:48,480 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:48,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:55:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 171. [2022-02-15 01:55:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-15 01:55:48,664 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 56 [2022-02-15 01:55:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:48,664 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-15 01:55:48,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-15 01:55:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:48,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:48,665 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:48,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2022-02-15 01:55:48,665 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:48,665 INFO L85 PathProgramCache]: Analyzing trace with hash 357328573, now seen corresponding path program 245 times [2022-02-15 01:55:48,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:48,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526600005] [2022-02-15 01:55:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:48,666 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:48,666 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:48,667 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:48,903 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:48,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526600005] [2022-02-15 01:55:48,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1526600005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:48,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:48,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:48,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948494962] [2022-02-15 01:55:48,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:48,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:48,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:48,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:48,904 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:49,633 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:55:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:49,634 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:49,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:49,634 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:55:49,634 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:55:49,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:49,635 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:49,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:55:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 173. [2022-02-15 01:55:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-15 01:55:49,822 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 56 [2022-02-15 01:55:49,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:49,822 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-15 01:55:49,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-15 01:55:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:49,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:49,822 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:49,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2022-02-15 01:55:49,822 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:49,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:49,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1860865597, now seen corresponding path program 246 times [2022-02-15 01:55:49,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:49,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122064247] [2022-02-15 01:55:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:49,823 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:49,823 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:49,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:49,824 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:50,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:50,054 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:50,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122064247] [2022-02-15 01:55:50,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122064247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:50,054 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:50,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:50,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706527504] [2022-02-15 01:55:50,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:50,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:50,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:50,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:50,055 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:50,797 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 01:55:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:50,797 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:50,798 INFO L225 Difference]: With dead ends: 242 [2022-02-15 01:55:50,798 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:55:50,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:50,798 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:50,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:50,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:55:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 175. [2022-02-15 01:55:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-15 01:55:50,988 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 56 [2022-02-15 01:55:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:50,988 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-15 01:55:50,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-15 01:55:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:50,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:50,989 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:50,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2022-02-15 01:55:50,989 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -644033091, now seen corresponding path program 247 times [2022-02-15 01:55:50,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:50,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133085205] [2022-02-15 01:55:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:50,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:50,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:50,990 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:51,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:51,220 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:51,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133085205] [2022-02-15 01:55:51,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133085205] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:51,220 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:51,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:51,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779334241] [2022-02-15 01:55:51,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:51,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:51,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:51,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:51,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:51,221 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:51,987 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 01:55:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:51,987 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:51,987 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:55:51,987 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:55:51,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:51,988 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:51,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 23 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:55:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 177. [2022-02-15 01:55:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-15 01:55:52,179 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 56 [2022-02-15 01:55:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:52,179 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-15 01:55:52,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-15 01:55:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:52,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:52,180 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:52,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2022-02-15 01:55:52,180 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:52,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1624980797, now seen corresponding path program 248 times [2022-02-15 01:55:52,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:52,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676901734] [2022-02-15 01:55:52,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:52,181 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:52,181 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:52,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:52,181 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:52,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:52,415 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:52,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676901734] [2022-02-15 01:55:52,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [676901734] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:52,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:52,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:52,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285532610] [2022-02-15 01:55:52,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:52,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:52,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:52,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:52,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:52,416 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:53,176 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 01:55:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:53,177 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:53,177 INFO L225 Difference]: With dead ends: 254 [2022-02-15 01:55:53,177 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:55:53,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:53,178 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:53,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 27 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:53,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:55:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 179. [2022-02-15 01:55:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-15 01:55:53,373 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 56 [2022-02-15 01:55:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:53,373 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-15 01:55:53,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-15 01:55:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:53,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:53,373 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:53,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2022-02-15 01:55:53,374 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:53,374 INFO L85 PathProgramCache]: Analyzing trace with hash 303940797, now seen corresponding path program 249 times [2022-02-15 01:55:53,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:53,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043456321] [2022-02-15 01:55:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:53,375 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:53,375 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:53,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:53,375 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:53,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:53,605 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:53,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043456321] [2022-02-15 01:55:53,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1043456321] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:53,606 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:53,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:53,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798611585] [2022-02-15 01:55:53,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:53,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:53,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:53,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:53,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:53,606 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:54,359 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 01:55:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:54,364 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:54,364 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:55:54,364 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 01:55:54,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:54,365 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:54,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 01:55:54,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 181. [2022-02-15 01:55:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-15 01:55:54,562 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 56 [2022-02-15 01:55:54,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:54,562 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-15 01:55:54,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-15 01:55:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:54,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:54,563 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:54,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2022-02-15 01:55:54,563 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:54,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2094820413, now seen corresponding path program 250 times [2022-02-15 01:55:54,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:54,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799437194] [2022-02-15 01:55:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:54,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:54,564 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:54,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:54,565 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:54,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:54,799 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:54,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799437194] [2022-02-15 01:55:54,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1799437194] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:54,799 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:54,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:54,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808719345] [2022-02-15 01:55:54,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:54,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:54,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:54,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:54,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:54,800 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:55,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:55,562 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 01:55:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:55,563 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:55,563 INFO L225 Difference]: With dead ends: 266 [2022-02-15 01:55:55,563 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 01:55:55,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:55,563 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:55,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 21 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:55,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 01:55:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 183. [2022-02-15 01:55:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-15 01:55:55,762 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 56 [2022-02-15 01:55:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:55,762 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-15 01:55:55,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-15 01:55:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:55,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:55,763 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:55,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2022-02-15 01:55:55,763 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash 848245693, now seen corresponding path program 251 times [2022-02-15 01:55:55,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:55,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503209004] [2022-02-15 01:55:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:55,764 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:55,764 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:55,765 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:55,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:56,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:56,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503209004] [2022-02-15 01:55:56,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [503209004] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:56,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:56,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:56,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885176739] [2022-02-15 01:55:56,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:56,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:56,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:56,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:56,003 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:56,774 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 01:55:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:56,775 INFO L225 Difference]: With dead ends: 272 [2022-02-15 01:55:56,775 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 01:55:56,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:56,775 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:56,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 15 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 01:55:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 185. [2022-02-15 01:55:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-15 01:55:56,980 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 56 [2022-02-15 01:55:56,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:56,981 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-15 01:55:56,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-15 01:55:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:55:56,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:56,981 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:56,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2022-02-15 01:55:56,981 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1185815357, now seen corresponding path program 252 times [2022-02-15 01:55:56,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:56,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910514447] [2022-02-15 01:55:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:56,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:56,982 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:56,983 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:57,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:57,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:57,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910514447] [2022-02-15 01:55:57,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910514447] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:57,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:57,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:55:57,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461849741] [2022-02-15 01:55:57,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:57,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:55:57,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:57,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:55:57,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:55:57,218 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:57,926 INFO L93 Difference]: Finished difference Result 234 states and 341 transitions. [2022-02-15 01:55:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:55:57,926 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:55:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:57,927 INFO L225 Difference]: With dead ends: 234 [2022-02-15 01:55:57,927 INFO L226 Difference]: Without dead ends: 228 [2022-02-15 01:55:57,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=953, Invalid=1597, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:55:57,927 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:57,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 19 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-15 01:55:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 145. [2022-02-15 01:55:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-02-15 01:55:58,068 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 56 [2022-02-15 01:55:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:58,068 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-02-15 01:55:58,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-02-15 01:55:58,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:55:58,068 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:58,068 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:58,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2022-02-15 01:55:58,069 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1554703328, now seen corresponding path program 253 times [2022-02-15 01:55:58,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:58,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428259238] [2022-02-15 01:55:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:58,070 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:58,070 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:58,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:58,070 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:58,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:58,340 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:58,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428259238] [2022-02-15 01:55:58,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1428259238] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:58,341 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:58,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:55:58,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827434536] [2022-02-15 01:55:58,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:58,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:55:58,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:58,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:55:58,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:55:58,342 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:55:58,993 INFO L93 Difference]: Finished difference Result 160 states and 231 transitions. [2022-02-15 01:55:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:55:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:55:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:55:58,994 INFO L225 Difference]: With dead ends: 160 [2022-02-15 01:55:58,994 INFO L226 Difference]: Without dead ends: 154 [2022-02-15 01:55:58,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:55:58,995 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 88 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:55:58,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 23 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:55:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-15 01:55:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2022-02-15 01:55:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:59,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2022-02-15 01:55:59,142 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 58 [2022-02-15 01:55:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:55:59,142 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2022-02-15 01:55:59,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:55:59,142 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2022-02-15 01:55:59,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:55:59,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:55:59,143 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:55:59,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2022-02-15 01:55:59,143 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:55:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:55:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash 459754336, now seen corresponding path program 254 times [2022-02-15 01:55:59,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:55:59,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133009496] [2022-02-15 01:55:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:55:59,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:55:59,144 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:55:59,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:55:59,146 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:55:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:59,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:55:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:55:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:55:59,396 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:55:59,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133009496] [2022-02-15 01:55:59,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [133009496] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:55:59,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:55:59,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:55:59,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782478187] [2022-02-15 01:55:59,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:55:59,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:55:59,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:55:59,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:55:59,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:55:59,397 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:00,046 INFO L93 Difference]: Finished difference Result 164 states and 236 transitions. [2022-02-15 01:56:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:00,047 INFO L225 Difference]: With dead ends: 164 [2022-02-15 01:56:00,047 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:56:00,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:00,047 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:00,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:00,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:56:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2022-02-15 01:56:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2022-02-15 01:56:00,204 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 58 [2022-02-15 01:56:00,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:00,204 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2022-02-15 01:56:00,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2022-02-15 01:56:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:00,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:00,204 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:00,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2022-02-15 01:56:00,204 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:00,204 INFO L85 PathProgramCache]: Analyzing trace with hash 480760544, now seen corresponding path program 255 times [2022-02-15 01:56:00,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:00,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275531523] [2022-02-15 01:56:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:00,205 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:00,206 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:00,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:00,206 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:00,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:00,452 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:00,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275531523] [2022-02-15 01:56:00,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1275531523] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:00,452 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:00,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:00,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138245680] [2022-02-15 01:56:00,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:00,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:00,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:00,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:00,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:00,453 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:01,117 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:56:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:01,117 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:01,118 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:56:01,118 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:56:01,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:01,118 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:01,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:56:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2022-02-15 01:56:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-15 01:56:01,282 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 58 [2022-02-15 01:56:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:01,282 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-15 01:56:01,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-15 01:56:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:01,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:01,282 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:01,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2022-02-15 01:56:01,283 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash -807110048, now seen corresponding path program 256 times [2022-02-15 01:56:01,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:01,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934858425] [2022-02-15 01:56:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:01,284 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:01,284 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:01,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:01,284 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:01,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:01,564 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:01,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934858425] [2022-02-15 01:56:01,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [934858425] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:01,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:01,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:01,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529159143] [2022-02-15 01:56:01,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:01,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:01,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:01,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:01,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:01,565 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:02,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:02,263 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:56:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:02,263 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:02,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:02,264 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:56:02,264 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:56:02,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:02,264 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:02,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 33 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:56:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2022-02-15 01:56:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-15 01:56:02,428 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 58 [2022-02-15 01:56:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:02,429 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-15 01:56:02,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-15 01:56:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:02,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:02,429 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:02,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2022-02-15 01:56:02,429 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1500167712, now seen corresponding path program 257 times [2022-02-15 01:56:02,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:02,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588848278] [2022-02-15 01:56:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:02,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:02,430 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:02,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:02,431 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:02,682 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:02,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588848278] [2022-02-15 01:56:02,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588848278] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:02,682 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:02,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:02,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777577440] [2022-02-15 01:56:02,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:02,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:02,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:02,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:02,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:02,683 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:03,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:03,365 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:56:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:03,366 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:56:03,366 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:56:03,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:03,366 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:03,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:56:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2022-02-15 01:56:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-15 01:56:03,535 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 58 [2022-02-15 01:56:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:03,535 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-15 01:56:03,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-15 01:56:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:03,536 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:03,536 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:03,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2022-02-15 01:56:03,536 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1808651936, now seen corresponding path program 258 times [2022-02-15 01:56:03,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:03,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043052165] [2022-02-15 01:56:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:03,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:03,537 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:03,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:03,538 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:03,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:03,788 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:03,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043052165] [2022-02-15 01:56:03,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043052165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:03,789 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:03,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:03,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901465371] [2022-02-15 01:56:03,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:03,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:03,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:03,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:03,789 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:04,478 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:56:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:04,478 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:04,478 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:56:04,478 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:56:04,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:04,479 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:04,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:56:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 161. [2022-02-15 01:56:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:04,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-15 01:56:04,653 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 58 [2022-02-15 01:56:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:04,653 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-15 01:56:04,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-15 01:56:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:04,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:04,653 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:04,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2022-02-15 01:56:04,654 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1909247776, now seen corresponding path program 259 times [2022-02-15 01:56:04,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:04,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390391019] [2022-02-15 01:56:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:04,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:04,655 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:04,655 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:04,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:04,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:04,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390391019] [2022-02-15 01:56:04,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1390391019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:04,910 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:04,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:04,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257928448] [2022-02-15 01:56:04,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:04,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:04,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:04,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:04,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:04,910 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:05,606 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:56:05,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:05,606 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:05,606 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:56:05,606 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:56:05,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:05,607 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:05,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:56:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 163. [2022-02-15 01:56:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-15 01:56:05,783 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 58 [2022-02-15 01:56:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:05,784 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-15 01:56:05,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-15 01:56:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:05,784 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:05,784 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:05,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2022-02-15 01:56:05,784 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:05,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:05,784 INFO L85 PathProgramCache]: Analyzing trace with hash 202397792, now seen corresponding path program 260 times [2022-02-15 01:56:05,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:05,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916294848] [2022-02-15 01:56:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:05,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:05,785 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:05,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:05,786 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:06,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:06,033 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:06,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916294848] [2022-02-15 01:56:06,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [916294848] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:06,033 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:06,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:06,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406373636] [2022-02-15 01:56:06,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:06,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:06,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:06,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:06,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:06,033 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:06,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:06,750 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:56:06,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:06,750 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:06,751 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:56:06,751 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:56:06,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:06,751 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:06,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:56:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 165. [2022-02-15 01:56:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-15 01:56:06,934 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 58 [2022-02-15 01:56:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:06,934 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-15 01:56:06,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-15 01:56:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:06,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:06,934 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:06,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2022-02-15 01:56:06,935 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2025742368, now seen corresponding path program 261 times [2022-02-15 01:56:06,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:06,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988916516] [2022-02-15 01:56:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:06,936 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:06,936 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:06,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:06,936 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:07,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:07,196 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:07,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988916516] [2022-02-15 01:56:07,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [988916516] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:07,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:07,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:07,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163155423] [2022-02-15 01:56:07,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:07,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:07,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:07,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:07,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:07,197 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:07,923 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:56:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:07,924 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:07,924 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:56:07,924 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:56:07,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:07,925 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:07,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:56:08,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2022-02-15 01:56:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-15 01:56:08,110 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 58 [2022-02-15 01:56:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:08,110 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-15 01:56:08,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-15 01:56:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:08,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:08,111 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:08,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2022-02-15 01:56:08,111 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:08,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:08,111 INFO L85 PathProgramCache]: Analyzing trace with hash -79755424, now seen corresponding path program 262 times [2022-02-15 01:56:08,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:08,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854149712] [2022-02-15 01:56:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:08,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:08,112 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:08,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:08,113 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:08,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:08,362 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:08,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854149712] [2022-02-15 01:56:08,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1854149712] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:08,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:08,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:08,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028261263] [2022-02-15 01:56:08,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:08,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:08,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:08,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:08,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:08,363 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:09,104 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:56:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:09,105 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:09,105 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:56:09,105 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:56:09,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:09,105 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:09,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:56:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 169. [2022-02-15 01:56:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-15 01:56:09,295 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 58 [2022-02-15 01:56:09,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:09,295 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-15 01:56:09,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-15 01:56:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:09,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:09,295 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:09,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2022-02-15 01:56:09,295 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1702924000, now seen corresponding path program 263 times [2022-02-15 01:56:09,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:09,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052925727] [2022-02-15 01:56:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:09,296 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:09,297 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:09,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:09,297 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:09,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:09,545 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:09,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052925727] [2022-02-15 01:56:09,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052925727] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:09,546 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:09,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:09,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471729150] [2022-02-15 01:56:09,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:09,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:09,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:09,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:09,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:09,547 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:10,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:10,307 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:56:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:10,308 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:10,308 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:56:10,308 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:56:10,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:10,309 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:10,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:10,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:56:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 171. [2022-02-15 01:56:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-15 01:56:10,503 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 58 [2022-02-15 01:56:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:10,503 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-15 01:56:10,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-15 01:56:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:10,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:10,503 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:10,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2022-02-15 01:56:10,503 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:10,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1165899360, now seen corresponding path program 264 times [2022-02-15 01:56:10,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:10,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624968026] [2022-02-15 01:56:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:10,505 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:10,505 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:10,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:10,505 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:10,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:10,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:10,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624968026] [2022-02-15 01:56:10,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1624968026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:10,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:10,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:10,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777212262] [2022-02-15 01:56:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:10,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:10,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:10,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:10,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:10,752 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:11,531 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:56:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:11,531 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:11,532 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:56:11,532 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:56:11,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:11,532 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:11,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:56:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 173. [2022-02-15 01:56:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-15 01:56:11,733 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 58 [2022-02-15 01:56:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:11,733 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-15 01:56:11,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-15 01:56:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:11,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:11,733 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:11,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2022-02-15 01:56:11,733 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash 481295840, now seen corresponding path program 265 times [2022-02-15 01:56:11,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:11,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121019234] [2022-02-15 01:56:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:11,734 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:11,735 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:11,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:11,735 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:11,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:11,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:11,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121019234] [2022-02-15 01:56:11,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1121019234] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:11,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:11,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:11,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686219968] [2022-02-15 01:56:11,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:11,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:11,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:11,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:11,982 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:12,755 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:56:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:12,756 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:12,756 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:56:12,756 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:56:12,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:12,756 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:12,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 23 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:12,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:56:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 175. [2022-02-15 01:56:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-15 01:56:12,958 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 58 [2022-02-15 01:56:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:12,959 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-15 01:56:12,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-15 01:56:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:12,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:12,959 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:12,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2022-02-15 01:56:12,959 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:12,959 INFO L85 PathProgramCache]: Analyzing trace with hash -292690592, now seen corresponding path program 266 times [2022-02-15 01:56:12,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:12,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803701719] [2022-02-15 01:56:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:12,960 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:12,960 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:12,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:12,961 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:13,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:13,207 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:13,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803701719] [2022-02-15 01:56:13,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803701719] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:13,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:13,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:13,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876308250] [2022-02-15 01:56:13,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:13,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:13,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:13,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:13,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:13,208 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:13,993 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:56:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:13,993 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:13,994 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:56:13,994 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:56:13,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:13,994 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:13,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 18 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:56:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2022-02-15 01:56:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-15 01:56:14,200 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 58 [2022-02-15 01:56:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:14,200 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-15 01:56:14,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-15 01:56:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:14,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:14,201 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:14,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2022-02-15 01:56:14,201 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:14,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:14,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1064309536, now seen corresponding path program 267 times [2022-02-15 01:56:14,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:14,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109772622] [2022-02-15 01:56:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:14,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:14,202 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:14,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:14,203 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:14,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:14,450 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:14,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109772622] [2022-02-15 01:56:14,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109772622] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:14,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:14,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:14,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583261274] [2022-02-15 01:56:14,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:14,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:14,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:14,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:14,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:14,451 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:15,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:15,244 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 01:56:15,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:15,245 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:15,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:15,245 INFO L225 Difference]: With dead ends: 242 [2022-02-15 01:56:15,245 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:56:15,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:15,246 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:15,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 25 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:56:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 179. [2022-02-15 01:56:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-15 01:56:15,456 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 58 [2022-02-15 01:56:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:15,457 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-15 01:56:15,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-15 01:56:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:15,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:15,457 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:15,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2022-02-15 01:56:15,457 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash 439227488, now seen corresponding path program 268 times [2022-02-15 01:56:15,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:15,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943022592] [2022-02-15 01:56:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:15,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:15,458 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:15,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:15,459 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:15,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:15,709 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:15,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943022592] [2022-02-15 01:56:15,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [943022592] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:15,709 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:15,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:15,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23103518] [2022-02-15 01:56:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:15,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:15,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:15,710 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:16,518 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 01:56:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:16,518 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:16,519 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:56:16,519 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:56:16,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:16,519 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:16,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 23 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:56:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 181. [2022-02-15 01:56:16,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-15 01:56:16,740 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 58 [2022-02-15 01:56:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:16,740 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-15 01:56:16,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-15 01:56:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:16,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:16,741 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:16,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2022-02-15 01:56:16,741 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2065671200, now seen corresponding path program 269 times [2022-02-15 01:56:16,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:16,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563826509] [2022-02-15 01:56:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:16,742 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:16,742 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:16,743 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:16,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:16,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:16,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563826509] [2022-02-15 01:56:16,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [563826509] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:16,994 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:16,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:16,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971302486] [2022-02-15 01:56:16,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:16,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:16,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:16,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:16,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:16,995 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:17,810 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 01:56:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:17,810 INFO L225 Difference]: With dead ends: 254 [2022-02-15 01:56:17,810 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:56:17,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:17,811 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:17,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:17,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:56:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 183. [2022-02-15 01:56:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-15 01:56:18,029 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 58 [2022-02-15 01:56:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:18,029 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-15 01:56:18,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-15 01:56:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:18,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:18,030 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:18,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2022-02-15 01:56:18,030 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:18,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:18,030 INFO L85 PathProgramCache]: Analyzing trace with hash 203342688, now seen corresponding path program 270 times [2022-02-15 01:56:18,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:18,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588996520] [2022-02-15 01:56:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:18,031 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:18,031 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:18,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:18,031 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:18,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:18,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:18,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588996520] [2022-02-15 01:56:18,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588996520] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:18,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:18,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:18,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858389795] [2022-02-15 01:56:18,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:18,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:18,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:18,276 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:19,095 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 01:56:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:19,095 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:19,095 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:56:19,095 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 01:56:19,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:19,096 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:19,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 01:56:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 185. [2022-02-15 01:56:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-15 01:56:19,315 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 58 [2022-02-15 01:56:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:19,316 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-15 01:56:19,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-15 01:56:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:19,316 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:19,316 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:19,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2022-02-15 01:56:19,316 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:19,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:19,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1117697312, now seen corresponding path program 271 times [2022-02-15 01:56:19,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:19,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260079198] [2022-02-15 01:56:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:19,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:19,317 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:19,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:19,318 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:19,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:19,572 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:19,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260079198] [2022-02-15 01:56:19,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1260079198] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:19,572 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:19,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:19,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478100165] [2022-02-15 01:56:19,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:19,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:19,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:19,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:19,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:19,573 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:20,396 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 01:56:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:20,397 INFO L225 Difference]: With dead ends: 266 [2022-02-15 01:56:20,397 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 01:56:20,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:20,397 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:20,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 01:56:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 187. [2022-02-15 01:56:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-15 01:56:20,622 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 58 [2022-02-15 01:56:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:20,622 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-15 01:56:20,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-15 01:56:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:20,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:20,622 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:20,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2022-02-15 01:56:20,622 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash 673182304, now seen corresponding path program 272 times [2022-02-15 01:56:20,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:20,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721654561] [2022-02-15 01:56:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:20,623 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:20,624 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:20,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:20,624 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:20,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:20,875 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:20,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721654561] [2022-02-15 01:56:20,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [721654561] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:20,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:20,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:20,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794124631] [2022-02-15 01:56:20,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:20,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:20,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:20,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:20,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:20,876 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:21,713 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 01:56:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:21,713 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:21,714 INFO L225 Difference]: With dead ends: 272 [2022-02-15 01:56:21,714 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 01:56:21,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:21,714 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:21,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:21,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 01:56:21,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 189. [2022-02-15 01:56:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-15 01:56:21,950 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 58 [2022-02-15 01:56:21,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:21,950 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-15 01:56:21,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-15 01:56:21,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:21,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:21,951 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:21,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2022-02-15 01:56:21,951 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:21,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:21,951 INFO L85 PathProgramCache]: Analyzing trace with hash -573392416, now seen corresponding path program 273 times [2022-02-15 01:56:21,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:21,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597194656] [2022-02-15 01:56:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:21,952 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:21,952 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:21,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:21,953 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:22,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:22,204 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:22,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597194656] [2022-02-15 01:56:22,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [597194656] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:22,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:22,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:22,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941869708] [2022-02-15 01:56:22,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:22,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:22,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:22,205 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:23,046 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 01:56:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:23,047 INFO L225 Difference]: With dead ends: 278 [2022-02-15 01:56:23,047 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 01:56:23,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:23,047 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:23,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 17 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 01:56:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 191. [2022-02-15 01:56:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-15 01:56:23,272 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 58 [2022-02-15 01:56:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:23,272 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-15 01:56:23,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-15 01:56:23,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:23,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:23,272 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:23,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2022-02-15 01:56:23,272 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash -235822752, now seen corresponding path program 274 times [2022-02-15 01:56:23,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:23,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251511804] [2022-02-15 01:56:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:23,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:23,273 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:23,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:23,274 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:23,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:23,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:23,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251511804] [2022-02-15 01:56:23,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [251511804] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:23,522 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:23,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:23,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709981730] [2022-02-15 01:56:23,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:23,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:23,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:23,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:23,523 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:24,358 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 01:56:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:24,359 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:56:24,359 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 01:56:24,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:24,359 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:24,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 25 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 01:56:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 193. [2022-02-15 01:56:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-15 01:56:24,583 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 58 [2022-02-15 01:56:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:24,583 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-15 01:56:24,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-15 01:56:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:56:24,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:24,584 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:24,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2022-02-15 01:56:24,584 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:24,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2046077152, now seen corresponding path program 275 times [2022-02-15 01:56:24,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:24,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330854842] [2022-02-15 01:56:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:24,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:24,585 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:24,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:24,585 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:24,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:24,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:24,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330854842] [2022-02-15 01:56:24,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1330854842] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:24,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:24,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:56:24,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067804486] [2022-02-15 01:56:24,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:24,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:56:24,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:24,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:56:24,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:56:24,831 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:25,600 INFO L93 Difference]: Finished difference Result 244 states and 356 transitions. [2022-02-15 01:56:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:56:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:56:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:25,600 INFO L225 Difference]: With dead ends: 244 [2022-02-15 01:56:25,600 INFO L226 Difference]: Without dead ends: 238 [2022-02-15 01:56:25,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1030, Invalid=1726, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:56:25,601 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:25,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-02-15 01:56:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 151. [2022-02-15 01:56:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2022-02-15 01:56:25,758 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 58 [2022-02-15 01:56:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:25,758 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2022-02-15 01:56:25,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2022-02-15 01:56:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:25,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:25,759 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:25,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2022-02-15 01:56:25,759 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:25,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1160080707, now seen corresponding path program 276 times [2022-02-15 01:56:25,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:25,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157825992] [2022-02-15 01:56:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:25,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:25,760 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:25,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:25,760 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:26,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:26,023 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:26,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157825992] [2022-02-15 01:56:26,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [157825992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:26,023 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:26,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:26,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377799038] [2022-02-15 01:56:26,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:26,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:26,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:26,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:26,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:26,024 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:26,715 INFO L93 Difference]: Finished difference Result 166 states and 240 transitions. [2022-02-15 01:56:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:26,715 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:26,715 INFO L225 Difference]: With dead ends: 166 [2022-02-15 01:56:26,715 INFO L226 Difference]: Without dead ends: 160 [2022-02-15 01:56:26,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:26,716 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:26,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 17 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-15 01:56:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-02-15 01:56:26,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.48) internal successors, (222), 150 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2022-02-15 01:56:26,879 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 60 [2022-02-15 01:56:26,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:26,879 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2022-02-15 01:56:26,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2022-02-15 01:56:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:26,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:26,879 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:26,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2022-02-15 01:56:26,879 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash 65131715, now seen corresponding path program 277 times [2022-02-15 01:56:26,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:26,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896448980] [2022-02-15 01:56:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:26,881 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:26,881 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:26,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:26,881 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:27,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:27,149 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:27,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896448980] [2022-02-15 01:56:27,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896448980] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:27,149 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:27,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:27,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585846138] [2022-02-15 01:56:27,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:27,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:27,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:27,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:27,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:27,150 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:27,849 INFO L93 Difference]: Finished difference Result 170 states and 245 transitions. [2022-02-15 01:56:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:27,850 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:27,850 INFO L225 Difference]: With dead ends: 170 [2022-02-15 01:56:27,850 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:56:27,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:27,850 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:27,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 23 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:56:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 159. [2022-02-15 01:56:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 232 transitions. [2022-02-15 01:56:28,028 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 232 transitions. Word has length 60 [2022-02-15 01:56:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:28,028 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 232 transitions. [2022-02-15 01:56:28,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 232 transitions. [2022-02-15 01:56:28,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:28,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:28,028 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:28,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2022-02-15 01:56:28,028 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:28,029 INFO L85 PathProgramCache]: Analyzing trace with hash 86137923, now seen corresponding path program 278 times [2022-02-15 01:56:28,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:28,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326473169] [2022-02-15 01:56:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:28,029 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:28,030 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:28,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:28,030 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:28,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:28,296 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:28,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326473169] [2022-02-15 01:56:28,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [326473169] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:28,296 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:28,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:28,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868763810] [2022-02-15 01:56:28,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:28,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:28,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:28,297 INFO L87 Difference]: Start difference. First operand 159 states and 232 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:29,007 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:56:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:29,008 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:29,008 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:56:29,008 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:56:29,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:29,009 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:29,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:56:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2022-02-15 01:56:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-15 01:56:29,191 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 60 [2022-02-15 01:56:29,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:29,192 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-15 01:56:29,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-15 01:56:29,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:29,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:29,192 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:29,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2022-02-15 01:56:29,192 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1201732669, now seen corresponding path program 279 times [2022-02-15 01:56:29,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:29,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359335942] [2022-02-15 01:56:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:29,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:29,193 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:29,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:29,194 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:29,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:29,460 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:29,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359335942] [2022-02-15 01:56:29,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1359335942] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:29,461 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:29,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:29,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521170868] [2022-02-15 01:56:29,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:29,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:29,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:29,462 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:30,186 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:56:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:30,186 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:30,186 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:56:30,186 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:56:30,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:30,187 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:30,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:56:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 163. [2022-02-15 01:56:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-15 01:56:30,376 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 60 [2022-02-15 01:56:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:30,376 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-15 01:56:30,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-15 01:56:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:30,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:30,376 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:30,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2022-02-15 01:56:30,376 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:30,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:30,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1894790333, now seen corresponding path program 280 times [2022-02-15 01:56:30,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:30,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655558036] [2022-02-15 01:56:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:30,377 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:30,378 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:30,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:30,378 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:30,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:30,642 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:30,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655558036] [2022-02-15 01:56:30,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655558036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:30,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:30,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:30,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876517024] [2022-02-15 01:56:30,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:30,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:30,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:30,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:30,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:30,643 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:31,377 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:56:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:31,377 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:31,378 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:56:31,378 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:56:31,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:31,378 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:31,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:56:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2022-02-15 01:56:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-15 01:56:31,564 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 60 [2022-02-15 01:56:31,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:31,565 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-15 01:56:31,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:31,565 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-15 01:56:31,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:31,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:31,565 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:31,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282 [2022-02-15 01:56:31,565 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:31,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2091692739, now seen corresponding path program 281 times [2022-02-15 01:56:31,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:31,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180761457] [2022-02-15 01:56:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:31,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:31,566 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:31,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:31,567 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:31,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:31,838 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:31,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180761457] [2022-02-15 01:56:31,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [180761457] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:31,838 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:31,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:31,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752241597] [2022-02-15 01:56:31,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:31,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:31,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:31,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:31,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:31,839 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:32,606 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:56:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:32,606 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:32,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:32,607 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:56:32,607 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:56:32,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:32,607 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:32,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:32,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:56:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2022-02-15 01:56:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-15 01:56:32,803 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 60 [2022-02-15 01:56:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:32,803 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-15 01:56:32,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-15 01:56:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:32,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:32,803 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:32,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2022-02-15 01:56:32,803 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:32,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1991096899, now seen corresponding path program 282 times [2022-02-15 01:56:32,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:32,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856015952] [2022-02-15 01:56:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:32,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:32,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:32,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:32,805 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:33,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:33,067 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:33,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856015952] [2022-02-15 01:56:33,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [856015952] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:33,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:33,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:33,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608109404] [2022-02-15 01:56:33,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:33,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:33,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:33,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:33,068 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:33,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:33,829 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:56:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:33,829 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:33,829 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:56:33,829 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:56:33,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:33,830 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:33,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:56:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 169. [2022-02-15 01:56:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-15 01:56:34,029 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 60 [2022-02-15 01:56:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:34,029 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-15 01:56:34,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-15 01:56:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:34,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:34,029 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:34,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2022-02-15 01:56:34,029 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:34,030 INFO L85 PathProgramCache]: Analyzing trace with hash -192224829, now seen corresponding path program 283 times [2022-02-15 01:56:34,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:34,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364044821] [2022-02-15 01:56:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:34,031 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:34,031 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:34,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:34,031 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:34,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:34,297 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:34,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364044821] [2022-02-15 01:56:34,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [364044821] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:34,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:34,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:34,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607575072] [2022-02-15 01:56:34,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:34,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:34,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:34,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:34,298 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:35,116 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:56:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:35,116 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:35,116 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:56:35,116 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:56:35,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:35,117 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:35,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:35,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:56:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 171. [2022-02-15 01:56:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-15 01:56:35,320 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 60 [2022-02-15 01:56:35,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:35,320 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-15 01:56:35,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-15 01:56:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:35,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:35,321 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:35,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2022-02-15 01:56:35,321 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1874602307, now seen corresponding path program 284 times [2022-02-15 01:56:35,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:35,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074851216] [2022-02-15 01:56:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:35,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:35,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:35,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:35,323 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:35,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:35,591 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:35,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074851216] [2022-02-15 01:56:35,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1074851216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:35,591 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:35,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:35,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474088609] [2022-02-15 01:56:35,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:35,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:35,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:35,592 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:36,378 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:56:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:36,378 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:36,378 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:56:36,379 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:56:36,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:36,379 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:36,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:56:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 173. [2022-02-15 01:56:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-15 01:56:36,589 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 60 [2022-02-15 01:56:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:36,589 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-15 01:56:36,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-15 01:56:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:36,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:36,590 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:36,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2022-02-15 01:56:36,590 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -474378045, now seen corresponding path program 285 times [2022-02-15 01:56:36,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:36,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209619285] [2022-02-15 01:56:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:36,591 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:36,591 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:36,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:36,591 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:36,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:36,854 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:36,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209619285] [2022-02-15 01:56:36,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [209619285] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:36,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:36,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:36,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223701025] [2022-02-15 01:56:36,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:36,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:36,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:36,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:36,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:36,855 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:37,655 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:56:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:37,655 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:37,656 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:56:37,656 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:56:37,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:37,656 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:37,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 17 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:56:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2022-02-15 01:56:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-15 01:56:37,872 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 60 [2022-02-15 01:56:37,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:37,872 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-15 01:56:37,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-15 01:56:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:37,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:37,873 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:37,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2022-02-15 01:56:37,873 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1308301379, now seen corresponding path program 286 times [2022-02-15 01:56:37,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:37,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273707463] [2022-02-15 01:56:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:37,874 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:37,874 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:37,875 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:38,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:38,142 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:38,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273707463] [2022-02-15 01:56:38,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1273707463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:38,142 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:38,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:38,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584669718] [2022-02-15 01:56:38,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:38,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:38,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:38,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:38,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:38,143 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:38,951 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:56:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:38,952 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:38,952 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:56:38,952 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:56:38,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:38,952 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:38,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:56:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 177. [2022-02-15 01:56:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-15 01:56:39,172 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 60 [2022-02-15 01:56:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:39,172 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-15 01:56:39,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-15 01:56:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:39,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:39,173 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:39,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288 [2022-02-15 01:56:39,173 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:39,173 INFO L85 PathProgramCache]: Analyzing trace with hash 771276739, now seen corresponding path program 287 times [2022-02-15 01:56:39,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:39,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223515985] [2022-02-15 01:56:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:39,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:39,174 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:39,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:39,175 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:39,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:39,439 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:39,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223515985] [2022-02-15 01:56:39,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [223515985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:39,440 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:39,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:39,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397724715] [2022-02-15 01:56:39,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:39,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:39,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:39,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:39,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:39,440 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:40,267 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:56:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:40,267 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:40,268 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:56:40,268 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:56:40,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:40,268 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:40,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:56:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 179. [2022-02-15 01:56:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-15 01:56:40,491 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 60 [2022-02-15 01:56:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:40,491 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-15 01:56:40,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-15 01:56:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:40,492 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:40,492 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:40,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2022-02-15 01:56:40,492 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash 86673219, now seen corresponding path program 288 times [2022-02-15 01:56:40,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:40,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634521278] [2022-02-15 01:56:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:40,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:40,493 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:40,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:40,493 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:40,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:40,757 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:40,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634521278] [2022-02-15 01:56:40,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [634521278] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:40,757 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:40,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:40,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357828122] [2022-02-15 01:56:40,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:40,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:40,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:40,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:40,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:40,758 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:41,603 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:56:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:41,603 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:41,604 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:56:41,604 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:56:41,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:41,604 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:41,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 19 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:41,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:56:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 181. [2022-02-15 01:56:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-15 01:56:41,830 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 60 [2022-02-15 01:56:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:41,831 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-15 01:56:41,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-15 01:56:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:41,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:41,831 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:41,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2022-02-15 01:56:41,831 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:41,831 INFO L85 PathProgramCache]: Analyzing trace with hash -687313213, now seen corresponding path program 289 times [2022-02-15 01:56:41,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:41,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076753348] [2022-02-15 01:56:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:41,832 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:41,832 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:41,833 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:42,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:42,134 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:42,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076753348] [2022-02-15 01:56:42,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076753348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:42,135 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:42,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:42,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876326219] [2022-02-15 01:56:42,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:42,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:42,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:42,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:42,135 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:42,985 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 01:56:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:42,985 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:42,985 INFO L225 Difference]: With dead ends: 242 [2022-02-15 01:56:42,985 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:56:42,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:42,986 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:42,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:42,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:56:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 183. [2022-02-15 01:56:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-15 01:56:43,220 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 60 [2022-02-15 01:56:43,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:43,220 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-15 01:56:43,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-15 01:56:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:43,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:43,220 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:43,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291 [2022-02-15 01:56:43,221 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1458932157, now seen corresponding path program 290 times [2022-02-15 01:56:43,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:43,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160574989] [2022-02-15 01:56:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:43,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:43,222 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:43,222 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:43,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:43,485 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:43,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160574989] [2022-02-15 01:56:43,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [160574989] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:43,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:43,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:43,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548217768] [2022-02-15 01:56:43,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:43,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:43,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:43,486 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:44,346 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 01:56:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:44,346 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:44,346 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:56:44,346 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:56:44,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:44,347 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:44,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 27 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:56:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2022-02-15 01:56:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-15 01:56:44,583 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 60 [2022-02-15 01:56:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:44,583 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-15 01:56:44,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-15 01:56:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:44,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:44,584 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:44,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292 [2022-02-15 01:56:44,584 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash 44604867, now seen corresponding path program 291 times [2022-02-15 01:56:44,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:44,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342917017] [2022-02-15 01:56:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:44,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:44,585 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:44,585 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:44,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:44,851 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:44,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342917017] [2022-02-15 01:56:44,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [342917017] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:44,851 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:44,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:44,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247257380] [2022-02-15 01:56:44,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:44,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:44,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:44,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:44,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:44,852 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:45,729 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 01:56:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:45,730 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:45,730 INFO L225 Difference]: With dead ends: 254 [2022-02-15 01:56:45,730 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:56:45,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:45,730 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:45,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 23 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:56:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 187. [2022-02-15 01:56:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:45,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-15 01:56:45,971 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 60 [2022-02-15 01:56:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:45,971 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-15 01:56:45,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-15 01:56:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:45,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:45,971 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:45,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2022-02-15 01:56:45,971 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:45,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1834673475, now seen corresponding path program 292 times [2022-02-15 01:56:45,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:45,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800308747] [2022-02-15 01:56:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:45,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:45,973 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:45,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:45,973 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:46,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:46,238 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:46,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800308747] [2022-02-15 01:56:46,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800308747] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:46,238 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:46,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:46,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782773956] [2022-02-15 01:56:46,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:46,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:46,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:46,239 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:47,123 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 01:56:47,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:47,124 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:47,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:47,124 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:56:47,124 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 01:56:47,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:47,125 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:47,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 01:56:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 189. [2022-02-15 01:56:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-15 01:56:47,373 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 60 [2022-02-15 01:56:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:47,373 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-15 01:56:47,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-15 01:56:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:47,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:47,373 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:47,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294 [2022-02-15 01:56:47,373 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:47,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash -191279933, now seen corresponding path program 293 times [2022-02-15 01:56:47,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:47,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439837499] [2022-02-15 01:56:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:47,374 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:47,375 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:47,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:47,375 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:47,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:47,638 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:47,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439837499] [2022-02-15 01:56:47,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [439837499] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:47,638 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:47,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:47,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957486807] [2022-02-15 01:56:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:47,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:47,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:47,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:47,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:47,639 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:48,532 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 01:56:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:48,532 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:48,533 INFO L225 Difference]: With dead ends: 266 [2022-02-15 01:56:48,533 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 01:56:48,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:48,533 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:48,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 01:56:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2022-02-15 01:56:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-15 01:56:48,781 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 60 [2022-02-15 01:56:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:48,781 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-15 01:56:48,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-15 01:56:48,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:48,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:48,781 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:48,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2022-02-15 01:56:48,781 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:48,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1512319933, now seen corresponding path program 294 times [2022-02-15 01:56:48,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:48,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625231624] [2022-02-15 01:56:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:48,782 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:48,783 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:48,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:48,783 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:49,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:49,049 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:49,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625231624] [2022-02-15 01:56:49,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1625231624] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:49,049 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:49,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:49,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928162275] [2022-02-15 01:56:49,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:49,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:49,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:49,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:49,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:49,050 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:49,954 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 01:56:49,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:49,954 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:49,954 INFO L225 Difference]: With dead ends: 272 [2022-02-15 01:56:49,954 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 01:56:49,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:49,955 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:49,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 27 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 01:56:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 193. [2022-02-15 01:56:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-15 01:56:50,208 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 60 [2022-02-15 01:56:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:50,208 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-15 01:56:50,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-15 01:56:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:50,209 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:50,209 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:50,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2022-02-15 01:56:50,209 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:50,209 INFO L85 PathProgramCache]: Analyzing trace with hash 278559683, now seen corresponding path program 295 times [2022-02-15 01:56:50,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:50,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808117256] [2022-02-15 01:56:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:50,210 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:50,210 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:50,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:50,211 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:50,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:50,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:50,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808117256] [2022-02-15 01:56:50,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [808117256] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:50,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:50,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:50,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994782631] [2022-02-15 01:56:50,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:50,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:50,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:50,477 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:51,389 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 01:56:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:51,389 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:51,390 INFO L225 Difference]: With dead ends: 278 [2022-02-15 01:56:51,390 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 01:56:51,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:51,390 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:51,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 23 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 01:56:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 195. [2022-02-15 01:56:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-15 01:56:51,650 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 60 [2022-02-15 01:56:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:51,651 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-15 01:56:51,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-15 01:56:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:51,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:51,651 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:51,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2022-02-15 01:56:51,651 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash -968015037, now seen corresponding path program 296 times [2022-02-15 01:56:51,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:51,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955453513] [2022-02-15 01:56:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:51,652 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:51,652 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:51,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:51,653 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:51,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:51,925 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:51,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955453513] [2022-02-15 01:56:51,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1955453513] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:51,925 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:51,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:51,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873613052] [2022-02-15 01:56:51,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:51,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:51,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:51,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:51,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:51,926 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:52,841 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 01:56:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:52,842 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:52,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:52,842 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:56:52,842 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 01:56:52,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:52,843 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:52,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 01:56:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 197. [2022-02-15 01:56:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-15 01:56:53,100 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 60 [2022-02-15 01:56:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:53,100 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-15 01:56:53,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-15 01:56:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:53,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:53,101 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:53,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2022-02-15 01:56:53,101 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash -630445373, now seen corresponding path program 297 times [2022-02-15 01:56:53,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:53,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367822171] [2022-02-15 01:56:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:53,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:53,102 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:53,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:53,102 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:53,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:53,369 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:53,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367822171] [2022-02-15 01:56:53,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [367822171] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:53,369 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:53,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:53,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615235250] [2022-02-15 01:56:53,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:53,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:53,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:53,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:53,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:53,370 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:54,288 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-15 01:56:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:54,288 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:54,289 INFO L225 Difference]: With dead ends: 290 [2022-02-15 01:56:54,289 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 01:56:54,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:54,289 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:54,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 17 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 01:56:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 199. [2022-02-15 01:56:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-15 01:56:54,550 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 60 [2022-02-15 01:56:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:54,550 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-15 01:56:54,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-15 01:56:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:54,550 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:54,550 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:54,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2022-02-15 01:56:54,550 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1651454531, now seen corresponding path program 298 times [2022-02-15 01:56:54,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:54,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015714983] [2022-02-15 01:56:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:54,552 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:54,552 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:54,552 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:54,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:54,816 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:54,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015714983] [2022-02-15 01:56:54,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1015714983] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:54,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:54,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:54,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406209271] [2022-02-15 01:56:54,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:54,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:54,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:54,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:54,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:54,817 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:55,739 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-15 01:56:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:55,739 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:55,740 INFO L225 Difference]: With dead ends: 296 [2022-02-15 01:56:55,740 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 01:56:55,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:55,740 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:55,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 01:56:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 201. [2022-02-15 01:56:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-15 01:56:56,001 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 60 [2022-02-15 01:56:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:56,002 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-15 01:56:56,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-15 01:56:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:56:56,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:56,002 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:56,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2022-02-15 01:56:56,002 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:56,002 INFO L85 PathProgramCache]: Analyzing trace with hash -171025981, now seen corresponding path program 299 times [2022-02-15 01:56:56,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:56,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226258571] [2022-02-15 01:56:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:56,003 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:56,003 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:56,004 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:56,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:56,272 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:56,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226258571] [2022-02-15 01:56:56,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [226258571] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:56,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:56,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:56:56,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868039410] [2022-02-15 01:56:56,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:56,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:56:56,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:56,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:56:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:56:56,273 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:57,119 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 01:56:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:56:57,119 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:56:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:57,120 INFO L225 Difference]: With dead ends: 254 [2022-02-15 01:56:57,120 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:56:57,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1110, Invalid=1860, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:56:57,120 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:57,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 17 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:56:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 157. [2022-02-15 01:56:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.480263157894737) internal successors, (225), 152 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 229 transitions. [2022-02-15 01:56:57,299 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 229 transitions. Word has length 60 [2022-02-15 01:56:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:57,299 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 229 transitions. [2022-02-15 01:56:57,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 229 transitions. [2022-02-15 01:56:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:56:57,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:57,299 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:57,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2022-02-15 01:56:57,300 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash -115136026, now seen corresponding path program 300 times [2022-02-15 01:56:57,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:57,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781941417] [2022-02-15 01:56:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:57,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:57,301 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:57,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:57,301 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:57,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:57,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:57,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781941417] [2022-02-15 01:56:57,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781941417] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:57,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:57,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:56:57,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287286991] [2022-02-15 01:56:57,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:57,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:56:57,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:57,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:56:57,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:56:57,587 INFO L87 Difference]: Start difference. First operand 157 states and 229 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:58,340 INFO L93 Difference]: Finished difference Result 172 states and 249 transitions. [2022-02-15 01:56:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:56:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:56:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:58,340 INFO L225 Difference]: With dead ends: 172 [2022-02-15 01:56:58,341 INFO L226 Difference]: Without dead ends: 166 [2022-02-15 01:56:58,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:56:58,341 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:58,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 19 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-02-15 01:56:58,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2022-02-15 01:56:58,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 156 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-02-15 01:56:58,527 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 62 [2022-02-15 01:56:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:58,527 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-02-15 01:56:58,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-02-15 01:56:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:56:58,528 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:58,528 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:58,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302 [2022-02-15 01:56:58,528 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:58,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1210085018, now seen corresponding path program 301 times [2022-02-15 01:56:58,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:58,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8364520] [2022-02-15 01:56:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:58,529 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:58,529 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:58,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:58,530 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:58,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:56:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:56:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:56:58,813 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:56:58,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8364520] [2022-02-15 01:56:58,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [8364520] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:56:58,813 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:56:58,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:56:58,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728717978] [2022-02-15 01:56:58,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:56:58,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:56:58,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:56:58,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:56:58,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:56:58,814 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:56:59,576 INFO L93 Difference]: Finished difference Result 176 states and 254 transitions. [2022-02-15 01:56:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:56:59,576 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:56:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:56:59,576 INFO L225 Difference]: With dead ends: 176 [2022-02-15 01:56:59,576 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:56:59,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:56:59,577 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:56:59,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:56:59,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:56:59,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2022-02-15 01:56:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.48125) internal successors, (237), 160 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 241 transitions. [2022-02-15 01:56:59,774 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 241 transitions. Word has length 62 [2022-02-15 01:56:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:56:59,774 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 241 transitions. [2022-02-15 01:56:59,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:56:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 241 transitions. [2022-02-15 01:56:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:56:59,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:56:59,775 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:56:59,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2022-02-15 01:56:59,775 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:56:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:56:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1189078810, now seen corresponding path program 302 times [2022-02-15 01:56:59,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:56:59,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708992595] [2022-02-15 01:56:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:56:59,776 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:56:59,776 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:56:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:56:59,777 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:56:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:00,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:00,058 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:00,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708992595] [2022-02-15 01:57:00,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [708992595] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:00,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:00,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:00,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224692905] [2022-02-15 01:57:00,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:00,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:00,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:00,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:00,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:00,059 INFO L87 Difference]: Start difference. First operand 165 states and 241 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:00,827 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:57:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:00,828 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:00,828 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:57:00,828 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:57:00,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:00,829 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:00,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 23 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:57:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 167. [2022-02-15 01:57:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-15 01:57:01,030 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 62 [2022-02-15 01:57:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:01,031 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-15 01:57:01,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-15 01:57:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:01,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:01,031 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:01,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304 [2022-02-15 01:57:01,031 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:01,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1818017894, now seen corresponding path program 303 times [2022-02-15 01:57:01,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:01,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069888079] [2022-02-15 01:57:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:01,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:01,032 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:01,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:01,033 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:01,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:01,313 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:01,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069888079] [2022-02-15 01:57:01,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2069888079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:01,313 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:01,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:01,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712202716] [2022-02-15 01:57:01,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:01,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:01,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:01,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:01,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:01,314 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:02,104 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:57:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:02,105 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:02,105 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:57:02,105 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:57:02,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:02,106 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:02,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:02,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:57:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 169. [2022-02-15 01:57:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-15 01:57:02,312 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 62 [2022-02-15 01:57:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:02,313 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-15 01:57:02,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-15 01:57:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:02,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:02,313 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:02,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2022-02-15 01:57:02,313 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:02,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1124960230, now seen corresponding path program 304 times [2022-02-15 01:57:02,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:02,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174493575] [2022-02-15 01:57:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:02,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:02,314 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:02,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:02,315 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:02,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:02,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:02,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174493575] [2022-02-15 01:57:02,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174493575] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:02,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:02,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:02,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947391668] [2022-02-15 01:57:02,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:02,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:02,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:02,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:02,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:02,600 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:03,398 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:57:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:03,399 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:57:03,399 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:57:03,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:03,399 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:03,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 27 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:57:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 171. [2022-02-15 01:57:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-15 01:57:03,611 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 62 [2022-02-15 01:57:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:03,611 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-15 01:57:03,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-15 01:57:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:03,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:03,611 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:03,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306 [2022-02-15 01:57:03,611 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash 816476006, now seen corresponding path program 305 times [2022-02-15 01:57:03,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:03,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203359826] [2022-02-15 01:57:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:03,612 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:03,613 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:03,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:03,613 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:03,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:03,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:03,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203359826] [2022-02-15 01:57:03,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [203359826] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:03,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:03,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:03,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525264567] [2022-02-15 01:57:03,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:03,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:03,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:03,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:03,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:03,902 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:04,705 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:57:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:04,705 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:04,706 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:57:04,706 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:57:04,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:04,706 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:04,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:57:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2022-02-15 01:57:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-15 01:57:04,926 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 62 [2022-02-15 01:57:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:04,926 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-15 01:57:04,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-15 01:57:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:04,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:04,926 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:04,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307 [2022-02-15 01:57:04,926 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash 715880166, now seen corresponding path program 306 times [2022-02-15 01:57:04,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:04,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004119726] [2022-02-15 01:57:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:04,927 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:04,928 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:04,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:04,928 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:05,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:05,206 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:05,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004119726] [2022-02-15 01:57:05,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004119726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:05,206 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:05,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:05,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126504890] [2022-02-15 01:57:05,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:05,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:05,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:05,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:05,207 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:06,023 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:57:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:06,023 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:57:06,024 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:57:06,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:06,024 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:06,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:57:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 175. [2022-02-15 01:57:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-15 01:57:06,247 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 62 [2022-02-15 01:57:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:06,247 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-15 01:57:06,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-15 01:57:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:06,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:06,248 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:06,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308 [2022-02-15 01:57:06,248 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1467441562, now seen corresponding path program 307 times [2022-02-15 01:57:06,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:06,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692896756] [2022-02-15 01:57:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:06,249 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:06,249 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:06,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:06,250 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:06,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:06,537 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:06,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692896756] [2022-02-15 01:57:06,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1692896756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:06,537 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:06,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:06,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590057417] [2022-02-15 01:57:06,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:06,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:06,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:06,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:06,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:06,538 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:07,367 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:57:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:07,368 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:07,368 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:57:07,368 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:57:07,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:07,369 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:07,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:07,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:57:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 177. [2022-02-15 01:57:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-15 01:57:07,595 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 62 [2022-02-15 01:57:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:07,595 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-15 01:57:07,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-15 01:57:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:07,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:07,596 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:07,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309 [2022-02-15 01:57:07,596 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash 599385574, now seen corresponding path program 308 times [2022-02-15 01:57:07,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:07,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722823418] [2022-02-15 01:57:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:07,597 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:07,597 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:07,598 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:07,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:07,878 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:07,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722823418] [2022-02-15 01:57:07,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [722823418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:07,878 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:07,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:07,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719070409] [2022-02-15 01:57:07,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:07,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:07,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:07,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:07,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:07,879 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:08,725 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:57:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:08,726 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:08,726 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:57:08,726 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:57:08,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:08,727 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:08,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:57:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 179. [2022-02-15 01:57:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-15 01:57:08,962 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 62 [2022-02-15 01:57:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:08,962 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-15 01:57:08,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-15 01:57:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:08,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:08,963 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:08,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2022-02-15 01:57:08,963 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:08,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1749594778, now seen corresponding path program 309 times [2022-02-15 01:57:08,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:08,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103054829] [2022-02-15 01:57:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:08,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:08,964 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:08,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:08,965 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:09,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:09,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:09,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103054829] [2022-02-15 01:57:09,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1103054829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:09,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:09,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:09,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900662044] [2022-02-15 01:57:09,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:09,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:09,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:09,252 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:10,114 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:57:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:10,115 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:57:10,115 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:57:10,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:10,115 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:10,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:10,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:57:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 181. [2022-02-15 01:57:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-15 01:57:10,355 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 62 [2022-02-15 01:57:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:10,355 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-15 01:57:10,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-15 01:57:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:10,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:10,355 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:10,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311 [2022-02-15 01:57:10,355 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash 33084646, now seen corresponding path program 310 times [2022-02-15 01:57:10,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:10,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973165298] [2022-02-15 01:57:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:10,356 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:10,356 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:10,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:10,357 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:10,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:10,637 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:10,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973165298] [2022-02-15 01:57:10,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973165298] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:10,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:10,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:10,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026553689] [2022-02-15 01:57:10,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:10,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:10,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:10,638 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:11,515 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:57:11,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:11,515 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:11,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:11,515 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:57:11,515 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:57:11,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:11,516 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:11,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:57:11,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 183. [2022-02-15 01:57:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:11,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-15 01:57:11,759 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 62 [2022-02-15 01:57:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:11,759 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-15 01:57:11,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-15 01:57:11,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:11,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:11,760 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:11,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312 [2022-02-15 01:57:11,760 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:11,760 INFO L85 PathProgramCache]: Analyzing trace with hash -503939994, now seen corresponding path program 311 times [2022-02-15 01:57:11,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:11,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947386645] [2022-02-15 01:57:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:11,761 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:11,761 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:11,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:11,762 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:12,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:12,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:12,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947386645] [2022-02-15 01:57:12,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1947386645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:12,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:12,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:12,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962817676] [2022-02-15 01:57:12,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:12,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:12,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:12,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:12,047 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:12,935 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:57:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:12,936 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:12,936 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:57:12,936 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:57:12,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:12,936 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:12,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:57:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 185. [2022-02-15 01:57:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-15 01:57:13,189 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 62 [2022-02-15 01:57:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:13,189 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-15 01:57:13,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-15 01:57:13,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:13,189 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:13,189 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:13,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2022-02-15 01:57:13,190 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:13,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1188543514, now seen corresponding path program 312 times [2022-02-15 01:57:13,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:13,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604321271] [2022-02-15 01:57:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:13,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:13,191 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:13,191 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:13,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:13,473 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:13,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604321271] [2022-02-15 01:57:13,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [604321271] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:13,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:13,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:13,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371451416] [2022-02-15 01:57:13,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:13,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:13,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:13,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:13,474 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:14,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:14,377 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 01:57:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:14,378 INFO L225 Difference]: With dead ends: 242 [2022-02-15 01:57:14,378 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:57:14,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:14,378 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:14,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:57:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 187. [2022-02-15 01:57:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-15 01:57:14,633 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 62 [2022-02-15 01:57:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:14,633 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-15 01:57:14,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:14,634 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-15 01:57:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:14,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:14,634 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:14,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314 [2022-02-15 01:57:14,634 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:14,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1962529946, now seen corresponding path program 313 times [2022-02-15 01:57:14,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:14,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550783149] [2022-02-15 01:57:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:14,635 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:14,635 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:14,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:14,636 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:14,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:14,915 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:14,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550783149] [2022-02-15 01:57:14,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550783149] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:14,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:14,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:14,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205722156] [2022-02-15 01:57:14,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:14,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:14,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:14,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:14,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:14,916 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:15,826 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 01:57:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:15,826 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:15,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:15,827 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:57:15,827 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:57:15,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:15,827 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:15,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 23 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:57:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 189. [2022-02-15 01:57:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-15 01:57:16,085 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 62 [2022-02-15 01:57:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:16,085 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-15 01:57:16,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-15 01:57:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:16,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:16,086 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:16,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315 [2022-02-15 01:57:16,086 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1560818406, now seen corresponding path program 314 times [2022-02-15 01:57:16,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:16,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514203739] [2022-02-15 01:57:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:16,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:16,087 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:16,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:16,087 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:16,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:16,367 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:16,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514203739] [2022-02-15 01:57:16,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514203739] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:16,367 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:16,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:16,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299569130] [2022-02-15 01:57:16,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:16,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:16,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:16,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:16,368 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:17,301 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 01:57:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:17,301 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:17,302 INFO L225 Difference]: With dead ends: 254 [2022-02-15 01:57:17,302 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:57:17,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:17,302 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:17,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:57:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 191. [2022-02-15 01:57:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-15 01:57:17,566 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 62 [2022-02-15 01:57:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:17,566 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-15 01:57:17,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-15 01:57:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:17,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:17,567 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:17,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316 [2022-02-15 01:57:17,567 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:17,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1230611866, now seen corresponding path program 315 times [2022-02-15 01:57:17,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:17,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655869697] [2022-02-15 01:57:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:17,568 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:17,568 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:17,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:17,569 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:17,850 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:17,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655869697] [2022-02-15 01:57:17,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [655869697] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:17,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:17,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:17,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234728065] [2022-02-15 01:57:17,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:17,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:17,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:17,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:17,851 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:18,796 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 01:57:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:18,797 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:57:18,797 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 01:57:18,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:18,797 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:18,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 01:57:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 193. [2022-02-15 01:57:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-15 01:57:19,069 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 62 [2022-02-15 01:57:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:19,069 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-15 01:57:19,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-15 01:57:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:19,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:19,069 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:19,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317 [2022-02-15 01:57:19,070 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash 559456742, now seen corresponding path program 316 times [2022-02-15 01:57:19,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:19,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40565808] [2022-02-15 01:57:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:19,071 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:19,071 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:19,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:19,071 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:19,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:19,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:19,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40565808] [2022-02-15 01:57:19,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [40565808] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:19,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:19,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:19,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64005054] [2022-02-15 01:57:19,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:19,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:19,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:19,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:19,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:19,354 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:20,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:20,307 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 01:57:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:20,308 INFO L225 Difference]: With dead ends: 266 [2022-02-15 01:57:20,308 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 01:57:20,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:20,308 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:20,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 01:57:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 195. [2022-02-15 01:57:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-15 01:57:20,583 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 62 [2022-02-15 01:57:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:20,583 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-15 01:57:20,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-15 01:57:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:20,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:20,583 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:20,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318 [2022-02-15 01:57:20,583 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1466496666, now seen corresponding path program 317 times [2022-02-15 01:57:20,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:20,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365259363] [2022-02-15 01:57:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:20,584 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:20,585 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:20,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:20,585 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:20,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:20,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:20,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365259363] [2022-02-15 01:57:20,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [365259363] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:20,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:20,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:20,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638222598] [2022-02-15 01:57:20,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:20,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:20,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:20,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:20,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:20,867 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:21,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:21,831 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 01:57:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:21,832 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:21,832 INFO L225 Difference]: With dead ends: 272 [2022-02-15 01:57:21,832 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 01:57:21,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:21,833 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:21,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 01:57:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 197. [2022-02-15 01:57:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-15 01:57:22,112 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 62 [2022-02-15 01:57:22,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:22,112 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-15 01:57:22,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-15 01:57:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:22,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:22,112 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:22,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319 [2022-02-15 01:57:22,112 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:22,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:22,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1507430630, now seen corresponding path program 318 times [2022-02-15 01:57:22,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:22,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451810991] [2022-02-15 01:57:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:22,113 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:22,113 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:22,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:22,114 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:22,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:22,395 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:22,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451810991] [2022-02-15 01:57:22,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [451810991] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:22,396 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:22,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:22,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593714852] [2022-02-15 01:57:22,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:22,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:22,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:22,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:22,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:22,397 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:23,374 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 01:57:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:23,375 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:23,375 INFO L225 Difference]: With dead ends: 278 [2022-02-15 01:57:23,375 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 01:57:23,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:23,376 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:23,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 23 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 01:57:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 199. [2022-02-15 01:57:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-15 01:57:23,660 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 62 [2022-02-15 01:57:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:23,660 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-15 01:57:23,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-15 01:57:23,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:23,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:23,660 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:23,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320 [2022-02-15 01:57:23,660 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:23,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:23,661 INFO L85 PathProgramCache]: Analyzing trace with hash -996657050, now seen corresponding path program 319 times [2022-02-15 01:57:23,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:23,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504589584] [2022-02-15 01:57:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:23,661 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:23,662 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:23,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:23,662 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:23,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:23,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:23,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504589584] [2022-02-15 01:57:23,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [504589584] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:23,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:23,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:23,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665746830] [2022-02-15 01:57:23,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:23,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:23,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:23,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:23,947 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:24,934 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 01:57:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:24,934 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:24,934 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:57:24,935 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 01:57:24,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:24,935 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:24,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 01:57:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 201. [2022-02-15 01:57:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-15 01:57:25,217 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 62 [2022-02-15 01:57:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:25,217 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-15 01:57:25,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-15 01:57:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:25,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:25,218 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:25,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321 [2022-02-15 01:57:25,218 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:25,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2051735526, now seen corresponding path program 320 times [2022-02-15 01:57:25,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:25,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046261276] [2022-02-15 01:57:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:25,219 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:25,219 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:25,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:25,220 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:25,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:25,502 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:25,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046261276] [2022-02-15 01:57:25,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046261276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:25,503 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:25,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:25,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254735971] [2022-02-15 01:57:25,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:25,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:25,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:25,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:25,503 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:26,460 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-15 01:57:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:26,461 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:26,461 INFO L225 Difference]: With dead ends: 290 [2022-02-15 01:57:26,461 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 01:57:26,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:26,462 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:26,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 01:57:26,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 203. [2022-02-15 01:57:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-15 01:57:26,733 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 62 [2022-02-15 01:57:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:26,734 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-15 01:57:26,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-15 01:57:26,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:26,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:26,734 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:26,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322 [2022-02-15 01:57:26,734 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1905662106, now seen corresponding path program 321 times [2022-02-15 01:57:26,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:26,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733759348] [2022-02-15 01:57:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:26,735 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:26,735 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:26,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:26,736 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:27,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:27,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:27,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733759348] [2022-02-15 01:57:27,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1733759348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:27,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:27,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:27,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377641021] [2022-02-15 01:57:27,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:27,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:27,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:27,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:27,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:27,011 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:27,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:27,970 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-15 01:57:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:27,970 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:27,970 INFO L225 Difference]: With dead ends: 296 [2022-02-15 01:57:27,970 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 01:57:27,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:27,971 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:27,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 01:57:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 205. [2022-02-15 01:57:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-15 01:57:28,245 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 62 [2022-02-15 01:57:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:28,245 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-15 01:57:28,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-15 01:57:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:28,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:28,245 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:28,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323 [2022-02-15 01:57:28,246 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:28,246 INFO L85 PathProgramCache]: Analyzing trace with hash 376237798, now seen corresponding path program 322 times [2022-02-15 01:57:28,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:28,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721269641] [2022-02-15 01:57:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:28,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:28,247 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:28,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:28,247 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:28,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:28,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:28,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721269641] [2022-02-15 01:57:28,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1721269641] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:28,523 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:28,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:28,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561535690] [2022-02-15 01:57:28,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:28,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:28,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:28,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:28,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:28,523 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:29,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:29,495 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-15 01:57:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:29,495 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:29,495 INFO L225 Difference]: With dead ends: 302 [2022-02-15 01:57:29,495 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 01:57:29,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:29,496 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:29,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 01:57:29,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 207. [2022-02-15 01:57:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-15 01:57:29,774 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 62 [2022-02-15 01:57:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:29,774 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-15 01:57:29,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-15 01:57:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:29,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:29,774 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:29,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324 [2022-02-15 01:57:29,774 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:29,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1446242714, now seen corresponding path program 323 times [2022-02-15 01:57:29,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:29,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741259298] [2022-02-15 01:57:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:29,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:29,776 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:29,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:29,776 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:30,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:30,053 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:30,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741259298] [2022-02-15 01:57:30,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741259298] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:30,054 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:30,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:30,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704377229] [2022-02-15 01:57:30,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:30,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:30,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:30,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:30,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:30,054 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:31,023 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-15 01:57:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:31,023 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:31,024 INFO L225 Difference]: With dead ends: 308 [2022-02-15 01:57:31,024 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 01:57:31,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:31,024 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:31,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 19 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 01:57:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 209. [2022-02-15 01:57:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-15 01:57:31,301 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 62 [2022-02-15 01:57:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:31,301 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-15 01:57:31,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-15 01:57:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:57:31,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:31,301 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:31,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325 [2022-02-15 01:57:31,301 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:31,302 INFO L85 PathProgramCache]: Analyzing trace with hash -503357978, now seen corresponding path program 324 times [2022-02-15 01:57:31,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:31,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067181730] [2022-02-15 01:57:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:31,302 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:31,302 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:31,303 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:31,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:31,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:31,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067181730] [2022-02-15 01:57:31,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067181730] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:31,577 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:31,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:57:31,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691144794] [2022-02-15 01:57:31,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:31,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:57:31,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:57:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:57:31,577 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:32,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:32,467 INFO L93 Difference]: Finished difference Result 264 states and 386 transitions. [2022-02-15 01:57:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:57:32,467 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:57:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:32,468 INFO L225 Difference]: With dead ends: 264 [2022-02-15 01:57:32,468 INFO L226 Difference]: Without dead ends: 258 [2022-02-15 01:57:32,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1193, Invalid=1999, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:57:32,468 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:32,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 17 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-15 01:57:32,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2022-02-15 01:57:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.481012658227848) internal successors, (234), 158 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 238 transitions. [2022-02-15 01:57:32,661 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 238 transitions. Word has length 62 [2022-02-15 01:57:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:32,661 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 238 transitions. [2022-02-15 01:57:32,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 238 transitions. [2022-02-15 01:57:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:32,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:32,661 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:32,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326 [2022-02-15 01:57:32,662 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:32,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1532737079, now seen corresponding path program 325 times [2022-02-15 01:57:32,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:32,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721131540] [2022-02-15 01:57:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:32,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:32,663 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:32,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:32,663 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:32,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:32,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:32,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721131540] [2022-02-15 01:57:32,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [721131540] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:32,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:32,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:32,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654167727] [2022-02-15 01:57:32,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:32,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:32,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:32,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:32,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:32,979 INFO L87 Difference]: Start difference. First operand 163 states and 238 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:33,751 INFO L93 Difference]: Finished difference Result 178 states and 258 transitions. [2022-02-15 01:57:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:33,752 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:33,752 INFO L225 Difference]: With dead ends: 178 [2022-02-15 01:57:33,752 INFO L226 Difference]: Without dead ends: 172 [2022-02-15 01:57:33,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:33,753 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:33,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 17 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-15 01:57:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2022-02-15 01:57:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.4814814814814814) internal successors, (240), 162 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2022-02-15 01:57:33,951 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 64 [2022-02-15 01:57:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:33,951 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2022-02-15 01:57:33,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2022-02-15 01:57:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:33,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:33,952 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:33,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327 [2022-02-15 01:57:33,952 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:33,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:33,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1667281225, now seen corresponding path program 326 times [2022-02-15 01:57:33,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:33,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33730042] [2022-02-15 01:57:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:33,953 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:33,953 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:33,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:33,954 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:34,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:34,250 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:34,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33730042] [2022-02-15 01:57:34,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [33730042] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:34,250 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:34,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:34,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363308221] [2022-02-15 01:57:34,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:34,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:34,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:34,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:34,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:34,251 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:35,029 INFO L93 Difference]: Finished difference Result 182 states and 263 transitions. [2022-02-15 01:57:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:35,029 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:35,030 INFO L225 Difference]: With dead ends: 182 [2022-02-15 01:57:35,030 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:57:35,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:35,030 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:35,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:57:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2022-02-15 01:57:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 250 transitions. [2022-02-15 01:57:35,240 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 250 transitions. Word has length 64 [2022-02-15 01:57:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:35,240 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 250 transitions. [2022-02-15 01:57:35,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 250 transitions. [2022-02-15 01:57:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:35,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:35,240 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:35,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328 [2022-02-15 01:57:35,241 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:35,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1688287433, now seen corresponding path program 327 times [2022-02-15 01:57:35,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:35,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237065039] [2022-02-15 01:57:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:35,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:35,242 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:35,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:35,242 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:35,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:35,535 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:35,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237065039] [2022-02-15 01:57:35,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [237065039] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:35,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:35,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:35,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648262812] [2022-02-15 01:57:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:35,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:35,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:35,536 INFO L87 Difference]: Start difference. First operand 171 states and 250 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:36,341 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:57:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:36,342 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:36,342 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:57:36,342 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:57:36,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:36,343 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:36,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:57:36,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2022-02-15 01:57:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-15 01:57:36,558 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 64 [2022-02-15 01:57:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:36,558 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-15 01:57:36,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-15 01:57:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:36,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:36,558 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:36,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329 [2022-02-15 01:57:36,559 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash 400416841, now seen corresponding path program 328 times [2022-02-15 01:57:36,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:36,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700047942] [2022-02-15 01:57:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:36,560 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:36,560 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:36,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:36,560 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:36,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:36,854 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:36,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700047942] [2022-02-15 01:57:36,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [700047942] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:36,854 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:36,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:36,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773579427] [2022-02-15 01:57:36,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:36,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:36,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:36,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:36,855 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:37,655 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:57:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:37,655 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:37,656 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:57:37,656 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:57:37,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:37,656 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:37,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:57:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 175. [2022-02-15 01:57:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-15 01:57:37,874 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 64 [2022-02-15 01:57:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:37,874 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-15 01:57:37,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-15 01:57:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:37,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:37,875 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:37,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330 [2022-02-15 01:57:37,875 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:37,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:37,875 INFO L85 PathProgramCache]: Analyzing trace with hash -292640823, now seen corresponding path program 329 times [2022-02-15 01:57:37,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:37,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299832451] [2022-02-15 01:57:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:37,876 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:37,876 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:37,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:37,877 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:38,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:38,170 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:38,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299832451] [2022-02-15 01:57:38,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299832451] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:38,170 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:38,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:38,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808550033] [2022-02-15 01:57:38,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:38,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:38,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:38,171 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:38,984 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:57:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:38,984 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:38,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:38,985 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:57:38,985 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:57:38,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:38,985 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:38,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:57:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 177. [2022-02-15 01:57:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-15 01:57:39,209 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 64 [2022-02-15 01:57:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:39,209 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-15 01:57:39,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-15 01:57:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:39,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:39,210 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:39,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331 [2022-02-15 01:57:39,210 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:39,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:39,210 INFO L85 PathProgramCache]: Analyzing trace with hash -601125047, now seen corresponding path program 330 times [2022-02-15 01:57:39,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:39,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908568392] [2022-02-15 01:57:39,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:39,211 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:39,211 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:39,212 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:39,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:39,520 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:39,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908568392] [2022-02-15 01:57:39,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [908568392] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:39,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:39,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:39,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617877262] [2022-02-15 01:57:39,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:39,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:39,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:39,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:39,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:39,521 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:40,348 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:57:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:40,349 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:57:40,349 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:57:40,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:40,349 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:40,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:57:40,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 179. [2022-02-15 01:57:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-15 01:57:40,578 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 64 [2022-02-15 01:57:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:40,578 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-15 01:57:40,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-15 01:57:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:40,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:40,579 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:40,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332 [2022-02-15 01:57:40,579 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash -701720887, now seen corresponding path program 331 times [2022-02-15 01:57:40,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:40,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208695006] [2022-02-15 01:57:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:40,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:40,580 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:40,581 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:40,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:40,878 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:40,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208695006] [2022-02-15 01:57:40,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1208695006] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:40,878 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:40,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:40,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734232349] [2022-02-15 01:57:40,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:40,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:40,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:40,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:40,879 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:41,736 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:57:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:41,737 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:41,737 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:57:41,737 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:57:41,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:41,737 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:41,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:57:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 181. [2022-02-15 01:57:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-15 01:57:41,974 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 64 [2022-02-15 01:57:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:41,974 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-15 01:57:41,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-15 01:57:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:41,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:41,974 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:41,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2022-02-15 01:57:41,974 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1409924681, now seen corresponding path program 332 times [2022-02-15 01:57:41,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:41,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771681686] [2022-02-15 01:57:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:41,976 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:41,976 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:41,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:41,976 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:42,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:42,269 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:42,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771681686] [2022-02-15 01:57:42,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771681686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:42,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:42,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:42,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345322759] [2022-02-15 01:57:42,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:42,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:42,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:42,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:42,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:42,270 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:43,123 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:57:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:43,124 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:57:43,124 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:57:43,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:43,124 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:43,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:57:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 183. [2022-02-15 01:57:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-15 01:57:43,364 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 64 [2022-02-15 01:57:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:43,364 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-15 01:57:43,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-15 01:57:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:43,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:43,364 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:43,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334 [2022-02-15 01:57:43,364 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:43,365 INFO L85 PathProgramCache]: Analyzing trace with hash -818215479, now seen corresponding path program 333 times [2022-02-15 01:57:43,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:43,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333849700] [2022-02-15 01:57:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:43,365 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:43,366 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:43,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:43,366 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:43,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:43,668 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:43,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333849700] [2022-02-15 01:57:43,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333849700] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:43,668 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:43,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:43,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813059327] [2022-02-15 01:57:43,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:43,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:43,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:43,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:43,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:43,669 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:44,544 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:57:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:44,544 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:44,544 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:57:44,544 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:57:44,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:44,545 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:44,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:57:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 185. [2022-02-15 01:57:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-15 01:57:44,791 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 64 [2022-02-15 01:57:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:44,791 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-15 01:57:44,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-15 01:57:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:44,791 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:44,791 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:44,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335 [2022-02-15 01:57:44,791 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:44,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1127771465, now seen corresponding path program 334 times [2022-02-15 01:57:44,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:44,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629630884] [2022-02-15 01:57:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:44,793 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:44,793 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:44,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:44,793 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:45,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:45,091 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:45,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629630884] [2022-02-15 01:57:45,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [629630884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:45,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:45,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:45,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302332798] [2022-02-15 01:57:45,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:45,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:45,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:45,092 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:45,983 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:57:45,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:45,983 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:45,984 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:57:45,984 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:57:45,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:45,984 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:45,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:57:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 187. [2022-02-15 01:57:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-15 01:57:46,235 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 64 [2022-02-15 01:57:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:46,235 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-15 01:57:46,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-15 01:57:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:46,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:46,235 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:46,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336 [2022-02-15 01:57:46,236 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1384516407, now seen corresponding path program 335 times [2022-02-15 01:57:46,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:46,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027695430] [2022-02-15 01:57:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:46,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:46,237 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:46,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:46,237 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:46,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:46,531 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:46,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027695430] [2022-02-15 01:57:46,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027695430] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:46,531 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:46,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:46,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909648975] [2022-02-15 01:57:46,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:46,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:46,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:46,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:46,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:46,532 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:47,440 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:57:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:47,440 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:47,441 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:57:47,441 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:57:47,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:47,441 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:47,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:47,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:57:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 189. [2022-02-15 01:57:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-15 01:57:47,704 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 64 [2022-02-15 01:57:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:47,705 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-15 01:57:47,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:47,705 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-15 01:57:47,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:47,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:47,705 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:47,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337 [2022-02-15 01:57:47,705 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:47,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:47,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1921541047, now seen corresponding path program 336 times [2022-02-15 01:57:47,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:47,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199063696] [2022-02-15 01:57:47,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:47,706 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:47,706 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:47,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:47,707 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:47,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:47,999 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:47,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199063696] [2022-02-15 01:57:48,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199063696] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:48,000 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:48,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:48,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72665812] [2022-02-15 01:57:48,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:48,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:48,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:48,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:48,000 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:48,931 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 01:57:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:48,932 INFO L225 Difference]: With dead ends: 242 [2022-02-15 01:57:48,932 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:57:48,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:48,932 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:48,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:57:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 191. [2022-02-15 01:57:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-15 01:57:49,197 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 64 [2022-02-15 01:57:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:49,197 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-15 01:57:49,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-15 01:57:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:49,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:49,198 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:49,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338 [2022-02-15 01:57:49,198 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:49,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:49,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1688822729, now seen corresponding path program 337 times [2022-02-15 01:57:49,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:49,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173620960] [2022-02-15 01:57:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:49,199 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:49,199 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:49,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:49,200 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:49,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:49,491 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:49,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173620960] [2022-02-15 01:57:49,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [173620960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:49,491 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:49,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:49,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278361473] [2022-02-15 01:57:49,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:49,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:49,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:49,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:49,492 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:50,428 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 01:57:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:50,428 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:57:50,428 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:57:50,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:50,429 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:50,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:57:50,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 193. [2022-02-15 01:57:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-15 01:57:50,697 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 64 [2022-02-15 01:57:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:50,697 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-15 01:57:50,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-15 01:57:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:50,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:50,697 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:50,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339 [2022-02-15 01:57:50,698 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:50,698 INFO L85 PathProgramCache]: Analyzing trace with hash 914836297, now seen corresponding path program 338 times [2022-02-15 01:57:50,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:50,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388765579] [2022-02-15 01:57:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:50,699 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:50,699 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:50,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:50,699 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:50,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:50,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:50,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388765579] [2022-02-15 01:57:50,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [388765579] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:50,994 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:50,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:50,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585299106] [2022-02-15 01:57:50,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:50,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:50,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:50,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:50,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:50,995 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:51,958 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 01:57:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:51,958 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:51,959 INFO L225 Difference]: With dead ends: 254 [2022-02-15 01:57:51,959 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:57:51,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:51,959 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:51,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 17 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:57:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 195. [2022-02-15 01:57:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-15 01:57:52,233 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 64 [2022-02-15 01:57:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:52,233 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-15 01:57:52,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-15 01:57:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:52,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:52,233 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:52,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340 [2022-02-15 01:57:52,233 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:52,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:52,234 INFO L85 PathProgramCache]: Analyzing trace with hash 143217353, now seen corresponding path program 339 times [2022-02-15 01:57:52,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:52,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045066775] [2022-02-15 01:57:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:52,235 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:52,235 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:52,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:52,235 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:52,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:52,528 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:52,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045066775] [2022-02-15 01:57:52,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045066775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:52,528 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:52,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:52,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879916250] [2022-02-15 01:57:52,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:52,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:52,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:52,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:52,529 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:53,496 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 01:57:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:53,496 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:53,496 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:57:53,496 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 01:57:53,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:53,497 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:53,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 27 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 01:57:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 197. [2022-02-15 01:57:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-15 01:57:53,776 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 64 [2022-02-15 01:57:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:53,776 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-15 01:57:53,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-15 01:57:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:53,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:53,777 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:53,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341 [2022-02-15 01:57:53,777 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:53,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1646754377, now seen corresponding path program 340 times [2022-02-15 01:57:53,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:53,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650493928] [2022-02-15 01:57:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:53,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:53,778 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:53,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:53,779 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:54,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:54,072 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:54,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650493928] [2022-02-15 01:57:54,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650493928] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:54,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:54,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:54,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248401697] [2022-02-15 01:57:54,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:54,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:54,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:54,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:54,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:54,073 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:55,038 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 01:57:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:55,039 INFO L225 Difference]: With dead ends: 266 [2022-02-15 01:57:55,039 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 01:57:55,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:55,040 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:55,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 15 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 01:57:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 199. [2022-02-15 01:57:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-15 01:57:55,322 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 64 [2022-02-15 01:57:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:55,322 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-15 01:57:55,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-15 01:57:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:55,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:55,323 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:55,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342 [2022-02-15 01:57:55,323 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:55,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:55,323 INFO L85 PathProgramCache]: Analyzing trace with hash -858144311, now seen corresponding path program 341 times [2022-02-15 01:57:55,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:55,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234375844] [2022-02-15 01:57:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:55,324 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:55,324 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:55,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:55,325 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:55,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:55,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:55,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234375844] [2022-02-15 01:57:55,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234375844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:55,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:55,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:55,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353562961] [2022-02-15 01:57:55,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:55,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:55,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:55,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:55,627 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:56,613 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 01:57:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:56,614 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:56,614 INFO L225 Difference]: With dead ends: 272 [2022-02-15 01:57:56,614 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 01:57:56,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:56,615 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:56,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 17 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 01:57:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 201. [2022-02-15 01:57:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-15 01:57:56,900 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 64 [2022-02-15 01:57:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:56,900 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-15 01:57:56,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-15 01:57:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:56,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:56,901 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:56,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343 [2022-02-15 01:57:56,901 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1410869577, now seen corresponding path program 342 times [2022-02-15 01:57:56,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:56,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169825369] [2022-02-15 01:57:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:56,902 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:56,902 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:56,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:56,903 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:57,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:57,205 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:57,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169825369] [2022-02-15 01:57:57,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1169825369] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:57,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:57,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:57,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097581201] [2022-02-15 01:57:57,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:57,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:57,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:57,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:57,206 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:58,207 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 01:57:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:58,208 INFO L225 Difference]: With dead ends: 278 [2022-02-15 01:57:58,208 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 01:57:58,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:58,208 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:58,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 27 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 01:57:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 203. [2022-02-15 01:57:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-15 01:57:58,505 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 64 [2022-02-15 01:57:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:57:58,505 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-15 01:57:58,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-15 01:57:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:57:58,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:57:58,506 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:57:58,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2022-02-15 01:57:58,506 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:57:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:57:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash 89829577, now seen corresponding path program 343 times [2022-02-15 01:57:58,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:57:58,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981172322] [2022-02-15 01:57:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:57:58,507 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:57:58,507 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:57:58,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:57:58,507 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:57:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:58,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:57:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:57:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:57:58,800 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:57:58,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981172322] [2022-02-15 01:57:58,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981172322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:57:58,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:57:58,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:57:58,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972752270] [2022-02-15 01:57:58,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:57:58,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:57:58,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:57:58,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:57:58,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:57:58,801 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:57:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:57:59,804 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 01:57:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:57:59,804 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:57:59,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:57:59,805 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:57:59,805 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 01:57:59,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:57:59,805 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:57:59,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 17 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:57:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 01:58:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 205. [2022-02-15 01:58:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-15 01:58:00,103 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 64 [2022-02-15 01:58:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:00,103 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-15 01:58:00,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-15 01:58:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:58:00,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:00,104 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:00,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345 [2022-02-15 01:58:00,104 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1880709193, now seen corresponding path program 344 times [2022-02-15 01:58:00,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:00,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114304729] [2022-02-15 01:58:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:00,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:00,105 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:00,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:00,105 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:00,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:00,398 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:00,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114304729] [2022-02-15 01:58:00,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114304729] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:00,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:00,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:58:00,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807962642] [2022-02-15 01:58:00,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:00,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:58:00,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:58:00,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:58:00,399 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:01,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:01,419 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-15 01:58:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:58:01,419 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:58:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:01,420 INFO L225 Difference]: With dead ends: 290 [2022-02-15 01:58:01,420 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 01:58:01,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:58:01,420 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:01,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 01:58:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 207. [2022-02-15 01:58:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-15 01:58:01,725 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 64 [2022-02-15 01:58:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:01,726 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-15 01:58:01,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-15 01:58:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:58:01,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:01,726 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:01,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346 [2022-02-15 01:58:01,726 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash 634134473, now seen corresponding path program 345 times [2022-02-15 01:58:01,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:01,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950370539] [2022-02-15 01:58:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:01,727 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:01,727 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:01,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:01,728 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:02,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:02,023 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:02,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950370539] [2022-02-15 01:58:02,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [950370539] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:02,023 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:02,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:58:02,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024536520] [2022-02-15 01:58:02,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:02,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:58:02,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:58:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:58:02,024 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:03,076 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-15 01:58:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:58:03,076 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:58:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:03,076 INFO L225 Difference]: With dead ends: 296 [2022-02-15 01:58:03,076 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 01:58:03,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:58:03,077 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:03,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 01:58:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 209. [2022-02-15 01:58:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-15 01:58:03,378 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 64 [2022-02-15 01:58:03,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:03,378 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-15 01:58:03,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-15 01:58:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:58:03,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:03,379 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:03,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347 [2022-02-15 01:58:03,379 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:03,379 INFO L85 PathProgramCache]: Analyzing trace with hash 971704137, now seen corresponding path program 346 times [2022-02-15 01:58:03,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:03,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344398893] [2022-02-15 01:58:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:03,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:03,380 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:03,381 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:03,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:03,674 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:03,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344398893] [2022-02-15 01:58:03,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [344398893] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:03,674 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:03,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:58:03,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802276569] [2022-02-15 01:58:03,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:03,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:58:03,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:58:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:58:03,675 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:04,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:04,720 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-15 01:58:04,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:58:04,720 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:58:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:04,721 INFO L225 Difference]: With dead ends: 302 [2022-02-15 01:58:04,721 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 01:58:04,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:58:04,721 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:04,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 01:58:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 211. [2022-02-15 01:58:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-15 01:58:05,031 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 64 [2022-02-15 01:58:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:05,031 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-15 01:58:05,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-15 01:58:05,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:58:05,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:05,031 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:05,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348 [2022-02-15 01:58:05,031 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:05,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1041363255, now seen corresponding path program 347 times [2022-02-15 01:58:05,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:05,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469621684] [2022-02-15 01:58:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:05,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:05,033 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:05,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:05,033 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:05,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:05,325 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:05,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469621684] [2022-02-15 01:58:05,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1469621684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:05,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:05,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:58:05,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591561274] [2022-02-15 01:58:05,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:05,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:58:05,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:05,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:58:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:58:05,326 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:06,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:06,372 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-15 01:58:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:58:06,372 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:58:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:06,372 INFO L225 Difference]: With dead ends: 308 [2022-02-15 01:58:06,372 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 01:58:06,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:58:06,373 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:06,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:06,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 01:58:06,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 213. [2022-02-15 01:58:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-15 01:58:06,680 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 64 [2022-02-15 01:58:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:06,680 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-15 01:58:06,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-15 01:58:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:58:06,680 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:06,681 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:06,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349 [2022-02-15 01:58:06,681 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:06,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1431123529, now seen corresponding path program 348 times [2022-02-15 01:58:06,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:06,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753589558] [2022-02-15 01:58:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:06,682 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:06,682 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:06,682 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:06,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:06,975 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:06,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753589558] [2022-02-15 01:58:06,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753589558] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:06,975 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:06,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:58:06,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130506222] [2022-02-15 01:58:06,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:06,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:58:06,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:58:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:58:06,976 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:08,024 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-15 01:58:08,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:58:08,025 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:58:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:08,025 INFO L225 Difference]: With dead ends: 314 [2022-02-15 01:58:08,025 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 01:58:08,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:58:08,026 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:08,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:08,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 01:58:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 215. [2022-02-15 01:58:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-15 01:58:08,339 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 64 [2022-02-15 01:58:08,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:08,340 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-15 01:58:08,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-15 01:58:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:58:08,340 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:08,340 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:08,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350 [2022-02-15 01:58:08,340 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1920959031, now seen corresponding path program 349 times [2022-02-15 01:58:08,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:08,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601104618] [2022-02-15 01:58:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:08,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:08,341 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:08,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:08,342 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:08,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:08,639 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:08,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601104618] [2022-02-15 01:58:08,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [601104618] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:08,639 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:08,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:58:08,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642452278] [2022-02-15 01:58:08,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:08,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:58:08,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:08,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:58:08,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:58:08,640 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:09,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:09,692 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-15 01:58:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:58:09,692 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:58:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:09,693 INFO L225 Difference]: With dead ends: 320 [2022-02-15 01:58:09,693 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 01:58:09,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:58:09,693 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:09,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 01:58:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 217. [2022-02-15 01:58:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-15 01:58:10,005 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 64 [2022-02-15 01:58:10,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:10,005 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-15 01:58:10,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-15 01:58:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:58:10,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:10,005 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:10,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351 [2022-02-15 01:58:10,005 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:10,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:10,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2046827191, now seen corresponding path program 350 times [2022-02-15 01:58:10,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:10,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739255604] [2022-02-15 01:58:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:10,007 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:10,007 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:10,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:10,007 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:10,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:10,304 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:10,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739255604] [2022-02-15 01:58:10,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [739255604] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:10,304 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:10,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:58:10,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456420079] [2022-02-15 01:58:10,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:10,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:58:10,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:58:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:58:10,305 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:11,284 INFO L93 Difference]: Finished difference Result 274 states and 401 transitions. [2022-02-15 01:58:11,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:58:11,284 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:58:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:11,285 INFO L225 Difference]: With dead ends: 274 [2022-02-15 01:58:11,285 INFO L226 Difference]: Without dead ends: 268 [2022-02-15 01:58:11,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1279, Invalid=2143, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:58:11,285 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:11,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 23 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-02-15 01:58:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 169. [2022-02-15 01:58:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.4817073170731707) internal successors, (243), 164 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2022-02-15 01:58:11,499 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 64 [2022-02-15 01:58:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:11,499 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2022-02-15 01:58:11,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2022-02-15 01:58:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:11,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:11,501 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:11,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352 [2022-02-15 01:58:11,501 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:11,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1952251116, now seen corresponding path program 351 times [2022-02-15 01:58:11,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:11,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089266094] [2022-02-15 01:58:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:11,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:11,503 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:11,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:11,503 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:11,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:11,815 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:11,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089266094] [2022-02-15 01:58:11,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089266094] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:11,815 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:11,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:11,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390641282] [2022-02-15 01:58:11,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:11,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:11,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:11,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:11,816 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:12,678 INFO L93 Difference]: Finished difference Result 184 states and 267 transitions. [2022-02-15 01:58:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:12,679 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:12,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:12,679 INFO L225 Difference]: With dead ends: 184 [2022-02-15 01:58:12,679 INFO L226 Difference]: Without dead ends: 178 [2022-02-15 01:58:12,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:12,679 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:12,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 19 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-15 01:58:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2022-02-15 01:58:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.4821428571428572) internal successors, (249), 168 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-02-15 01:58:12,898 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 66 [2022-02-15 01:58:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:12,898 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-02-15 01:58:12,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-02-15 01:58:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:12,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:12,898 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:12,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353 [2022-02-15 01:58:12,898 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash 857302124, now seen corresponding path program 352 times [2022-02-15 01:58:12,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:12,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674964829] [2022-02-15 01:58:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:12,899 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:12,900 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:12,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:12,900 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:13,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:13,210 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:13,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674964829] [2022-02-15 01:58:13,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [674964829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:13,210 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:13,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:13,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238491599] [2022-02-15 01:58:13,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:13,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:13,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:13,211 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:14,036 INFO L93 Difference]: Finished difference Result 188 states and 272 transitions. [2022-02-15 01:58:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:14,036 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:14,037 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:58:14,037 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:58:14,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:14,037 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:14,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:58:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2022-02-15 01:58:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 172 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 259 transitions. [2022-02-15 01:58:14,268 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 259 transitions. Word has length 66 [2022-02-15 01:58:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:14,269 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 259 transitions. [2022-02-15 01:58:14,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 259 transitions. [2022-02-15 01:58:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:14,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:14,269 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:14,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354 [2022-02-15 01:58:14,269 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:14,269 INFO L85 PathProgramCache]: Analyzing trace with hash 878308332, now seen corresponding path program 353 times [2022-02-15 01:58:14,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:14,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704313292] [2022-02-15 01:58:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:14,270 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:14,270 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:14,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:14,271 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:14,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:14,587 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:14,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704313292] [2022-02-15 01:58:14,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1704313292] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:14,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:14,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:14,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767131998] [2022-02-15 01:58:14,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:14,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:14,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:14,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:14,588 INFO L87 Difference]: Start difference. First operand 177 states and 259 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:15,437 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:58:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:15,438 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:58:15,438 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:58:15,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:15,438 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:15,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:58:15,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-02-15 01:58:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-15 01:58:15,676 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 66 [2022-02-15 01:58:15,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:15,676 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-15 01:58:15,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:15,676 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-15 01:58:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:15,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:15,676 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:15,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355 [2022-02-15 01:58:15,677 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:15,677 INFO L85 PathProgramCache]: Analyzing trace with hash -409562260, now seen corresponding path program 354 times [2022-02-15 01:58:15,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:15,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018431214] [2022-02-15 01:58:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:15,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:15,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:15,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:15,678 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:15,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:15,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:15,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018431214] [2022-02-15 01:58:15,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2018431214] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:15,994 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:15,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:15,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349747826] [2022-02-15 01:58:15,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:15,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:15,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:15,995 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:16,849 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:58:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:16,850 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:58:16,850 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:58:16,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:16,850 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:16,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 17 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:58:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 181. [2022-02-15 01:58:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-15 01:58:17,092 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 66 [2022-02-15 01:58:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:17,092 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-15 01:58:17,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-15 01:58:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:17,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:17,093 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:17,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356 [2022-02-15 01:58:17,093 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:17,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1102619924, now seen corresponding path program 355 times [2022-02-15 01:58:17,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:17,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368164466] [2022-02-15 01:58:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:17,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:17,094 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:17,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:17,095 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:17,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:17,423 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:17,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368164466] [2022-02-15 01:58:17,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368164466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:17,423 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:17,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:17,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441656465] [2022-02-15 01:58:17,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:17,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:17,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:17,424 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:18,295 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:58:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:18,296 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:18,296 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:58:18,296 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:58:18,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:18,296 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:18,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 27 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:58:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 183. [2022-02-15 01:58:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-15 01:58:18,542 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 66 [2022-02-15 01:58:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:18,542 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-15 01:58:18,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-15 01:58:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:18,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:18,543 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:18,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357 [2022-02-15 01:58:18,543 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:18,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:18,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1411104148, now seen corresponding path program 356 times [2022-02-15 01:58:18,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:18,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282982399] [2022-02-15 01:58:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:18,544 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:18,544 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:18,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:18,545 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:18,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:18,856 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:18,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282982399] [2022-02-15 01:58:18,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282982399] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:18,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:18,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:18,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764428729] [2022-02-15 01:58:18,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:18,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:18,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:18,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:18,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:18,857 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:19,744 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:58:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:19,745 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:19,745 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:58:19,745 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:58:19,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:19,745 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:19,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 25 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:58:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 185. [2022-02-15 01:58:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-15 01:58:19,998 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 66 [2022-02-15 01:58:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:19,998 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-15 01:58:19,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-15 01:58:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:19,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:19,998 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:19,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358 [2022-02-15 01:58:19,999 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:19,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1511699988, now seen corresponding path program 357 times [2022-02-15 01:58:19,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:19,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644645682] [2022-02-15 01:58:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:20,000 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:20,000 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:20,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:20,000 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:20,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:20,314 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:20,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644645682] [2022-02-15 01:58:20,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1644645682] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:20,314 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:20,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:20,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425580122] [2022-02-15 01:58:20,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:20,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:20,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:20,315 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:21,225 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:58:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:21,225 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:21,226 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:58:21,226 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:58:21,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:21,226 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:21,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:58:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 187. [2022-02-15 01:58:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-15 01:58:21,495 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 66 [2022-02-15 01:58:21,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:21,495 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-15 01:58:21,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-15 01:58:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:21,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:21,496 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:21,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359 [2022-02-15 01:58:21,496 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash 599945580, now seen corresponding path program 358 times [2022-02-15 01:58:21,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:21,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122585235] [2022-02-15 01:58:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:21,497 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:21,497 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:21,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:21,497 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:21,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:21,808 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:21,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122585235] [2022-02-15 01:58:21,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1122585235] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:21,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:21,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:21,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184214824] [2022-02-15 01:58:21,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:21,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:21,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:21,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:21,809 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:22,736 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:58:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:22,737 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:58:22,737 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:58:22,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:22,737 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:22,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:58:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 189. [2022-02-15 01:58:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-15 01:58:23,001 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 66 [2022-02-15 01:58:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:23,002 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-15 01:58:23,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-15 01:58:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:23,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:23,002 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:23,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360 [2022-02-15 01:58:23,002 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:23,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1628194580, now seen corresponding path program 359 times [2022-02-15 01:58:23,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:23,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717377646] [2022-02-15 01:58:23,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:23,003 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:23,003 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:23,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:23,004 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:23,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:23,314 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:23,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717377646] [2022-02-15 01:58:23,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [717377646] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:23,314 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:23,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:23,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899213643] [2022-02-15 01:58:23,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:23,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:23,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:23,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:23,315 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:24,248 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:58:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:24,248 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:24,249 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:58:24,249 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:58:24,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:24,249 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:24,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 27 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:58:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 191. [2022-02-15 01:58:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-15 01:58:24,519 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 66 [2022-02-15 01:58:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:24,519 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-15 01:58:24,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-15 01:58:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:24,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:24,520 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:24,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361 [2022-02-15 01:58:24,520 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:24,520 INFO L85 PathProgramCache]: Analyzing trace with hash 317792364, now seen corresponding path program 360 times [2022-02-15 01:58:24,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:24,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31265090] [2022-02-15 01:58:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:24,521 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:24,521 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:24,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:24,521 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:24,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:24,844 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:24,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31265090] [2022-02-15 01:58:24,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [31265090] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:24,844 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:24,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:24,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995509196] [2022-02-15 01:58:24,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:24,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:24,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:24,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:24,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:24,845 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:25,797 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:58:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:25,797 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:25,798 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:58:25,798 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:58:25,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:25,798 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:25,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:58:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 193. [2022-02-15 01:58:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-15 01:58:26,075 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 66 [2022-02-15 01:58:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:26,075 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-15 01:58:26,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-15 01:58:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:26,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:26,075 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:26,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362 [2022-02-15 01:58:26,076 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2100471788, now seen corresponding path program 361 times [2022-02-15 01:58:26,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:26,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361168363] [2022-02-15 01:58:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:26,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:26,077 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:26,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:26,077 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:26,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:26,391 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:26,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361168363] [2022-02-15 01:58:26,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [361168363] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:26,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:26,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:26,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793350294] [2022-02-15 01:58:26,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:26,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:26,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:26,392 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:27,367 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 01:58:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:27,368 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:27,368 INFO L225 Difference]: With dead ends: 242 [2022-02-15 01:58:27,368 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:58:27,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:27,369 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:27,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:58:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 195. [2022-02-15 01:58:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-15 01:58:27,654 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 66 [2022-02-15 01:58:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:27,654 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-15 01:58:27,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-15 01:58:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:27,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:27,654 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:27,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363 [2022-02-15 01:58:27,654 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1563447148, now seen corresponding path program 362 times [2022-02-15 01:58:27,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:27,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083264639] [2022-02-15 01:58:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:27,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:27,656 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:27,656 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:27,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:27,975 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:27,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083264639] [2022-02-15 01:58:27,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083264639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:27,975 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:27,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:27,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120008784] [2022-02-15 01:58:27,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:27,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:27,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:27,976 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:28,973 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 01:58:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:28,973 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:28,974 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:58:28,974 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:58:28,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:28,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:28,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:58:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 197. [2022-02-15 01:58:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-15 01:58:29,263 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 66 [2022-02-15 01:58:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:29,263 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-15 01:58:29,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-15 01:58:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:29,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:29,263 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:29,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364 [2022-02-15 01:58:29,263 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:29,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:29,264 INFO L85 PathProgramCache]: Analyzing trace with hash 878843628, now seen corresponding path program 363 times [2022-02-15 01:58:29,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:29,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256461404] [2022-02-15 01:58:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:29,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:29,265 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:29,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:29,265 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:29,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:29,582 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:29,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256461404] [2022-02-15 01:58:29,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1256461404] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:29,582 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:29,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:29,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060969696] [2022-02-15 01:58:29,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:29,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:29,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:29,583 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:30,574 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 01:58:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:30,575 INFO L225 Difference]: With dead ends: 254 [2022-02-15 01:58:30,575 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:58:30,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:30,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:30,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 25 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:58:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 199. [2022-02-15 01:58:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-15 01:58:30,875 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 66 [2022-02-15 01:58:30,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:30,875 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-15 01:58:30,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:30,875 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-15 01:58:30,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:30,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:30,875 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:30,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365 [2022-02-15 01:58:30,875 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:30,876 INFO L85 PathProgramCache]: Analyzing trace with hash 104857196, now seen corresponding path program 364 times [2022-02-15 01:58:30,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:30,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997457624] [2022-02-15 01:58:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:30,876 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:30,877 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:30,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:30,877 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:31,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:31,195 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:31,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997457624] [2022-02-15 01:58:31,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [997457624] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:31,195 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:31,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:31,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929507288] [2022-02-15 01:58:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:31,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:31,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:31,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:31,196 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:32,226 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 01:58:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:32,226 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:32,227 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:58:32,227 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 01:58:32,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:32,227 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:32,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 01:58:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2022-02-15 01:58:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-15 01:58:32,528 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 66 [2022-02-15 01:58:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:32,528 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-15 01:58:32,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-15 01:58:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:32,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:32,529 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:32,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366 [2022-02-15 01:58:32,529 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:32,529 INFO L85 PathProgramCache]: Analyzing trace with hash -666761748, now seen corresponding path program 365 times [2022-02-15 01:58:32,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:32,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565954517] [2022-02-15 01:58:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:32,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:32,530 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:32,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:32,531 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:32,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:32,841 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:32,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565954517] [2022-02-15 01:58:32,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1565954517] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:32,841 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:32,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:32,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352549748] [2022-02-15 01:58:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:32,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:32,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:32,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:32,842 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:33,868 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 01:58:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:33,869 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:33,869 INFO L225 Difference]: With dead ends: 266 [2022-02-15 01:58:33,869 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 01:58:33,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:33,869 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:33,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:33,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 01:58:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 203. [2022-02-15 01:58:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-15 01:58:34,174 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 66 [2022-02-15 01:58:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:34,174 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-15 01:58:34,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-15 01:58:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:34,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:34,175 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:34,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367 [2022-02-15 01:58:34,175 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash 836775276, now seen corresponding path program 366 times [2022-02-15 01:58:34,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:34,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115471388] [2022-02-15 01:58:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:34,176 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:34,176 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:34,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:34,176 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:34,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:34,486 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:34,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115471388] [2022-02-15 01:58:34,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115471388] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:34,487 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:34,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:34,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727419466] [2022-02-15 01:58:34,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:34,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:34,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:34,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:34,487 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:35,529 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 01:58:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:35,529 INFO L225 Difference]: With dead ends: 272 [2022-02-15 01:58:35,529 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 01:58:35,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:35,530 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:35,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 01:58:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 205. [2022-02-15 01:58:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-15 01:58:35,838 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 66 [2022-02-15 01:58:35,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:35,839 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-15 01:58:35,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-15 01:58:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:35,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:35,839 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:35,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368 [2022-02-15 01:58:35,839 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:35,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:35,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1668123412, now seen corresponding path program 367 times [2022-02-15 01:58:35,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:35,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580145494] [2022-02-15 01:58:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:35,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:35,840 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:35,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:35,841 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:36,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:36,150 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:36,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580145494] [2022-02-15 01:58:36,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1580145494] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:36,150 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:36,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:36,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322610710] [2022-02-15 01:58:36,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:36,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:36,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:36,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:36,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:36,151 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:37,228 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 01:58:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:37,228 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:37,229 INFO L225 Difference]: With dead ends: 278 [2022-02-15 01:58:37,229 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 01:58:37,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:37,229 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:37,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 25 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 01:58:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 207. [2022-02-15 01:58:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-15 01:58:37,548 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 66 [2022-02-15 01:58:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:37,548 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-15 01:58:37,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-15 01:58:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:37,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:37,548 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:37,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369 [2022-02-15 01:58:37,549 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash 600890476, now seen corresponding path program 368 times [2022-02-15 01:58:37,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:37,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853965313] [2022-02-15 01:58:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:37,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:37,550 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:37,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:37,550 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:37,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:37,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:37,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853965313] [2022-02-15 01:58:37,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [853965313] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:37,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:37,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:37,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17948730] [2022-02-15 01:58:37,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:37,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:37,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:37,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:37,864 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:38,930 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 01:58:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:38,930 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:38,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:38,931 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:58:38,931 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 01:58:38,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:38,931 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:38,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 17 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:38,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 01:58:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 209. [2022-02-15 01:58:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-15 01:58:39,252 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 66 [2022-02-15 01:58:39,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:39,252 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-15 01:58:39,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:39,252 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-15 01:58:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:39,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:39,252 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:39,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370 [2022-02-15 01:58:39,252 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:39,253 INFO L85 PathProgramCache]: Analyzing trace with hash -720149524, now seen corresponding path program 369 times [2022-02-15 01:58:39,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:39,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875911928] [2022-02-15 01:58:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:39,253 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:39,254 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:39,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:39,254 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:39,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:39,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:39,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875911928] [2022-02-15 01:58:39,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875911928] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:39,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:39,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:39,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539489214] [2022-02-15 01:58:39,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:39,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:39,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:39,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:39,587 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:40,674 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-15 01:58:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:40,674 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:40,675 INFO L225 Difference]: With dead ends: 290 [2022-02-15 01:58:40,675 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 01:58:40,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:40,675 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:40,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 01:58:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 211. [2022-02-15 01:58:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-15 01:58:41,001 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 66 [2022-02-15 01:58:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:41,001 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-15 01:58:41,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-15 01:58:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:41,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:41,002 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:41,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371 [2022-02-15 01:58:41,002 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1070730092, now seen corresponding path program 370 times [2022-02-15 01:58:41,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:41,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832990335] [2022-02-15 01:58:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:41,003 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:41,003 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:41,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:41,003 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:41,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:41,315 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:41,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832990335] [2022-02-15 01:58:41,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [832990335] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:41,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:41,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:41,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168353132] [2022-02-15 01:58:41,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:41,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:41,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:41,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:41,316 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:42,424 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-15 01:58:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:42,424 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:42,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:42,424 INFO L225 Difference]: With dead ends: 296 [2022-02-15 01:58:42,424 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 01:58:42,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:42,425 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:42,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 29 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 01:58:42,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 213. [2022-02-15 01:58:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-15 01:58:42,755 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 66 [2022-02-15 01:58:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:42,755 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-15 01:58:42,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-15 01:58:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:42,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:42,756 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:42,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372 [2022-02-15 01:58:42,756 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:42,756 INFO L85 PathProgramCache]: Analyzing trace with hash -175844628, now seen corresponding path program 371 times [2022-02-15 01:58:42,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:42,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728268619] [2022-02-15 01:58:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:42,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:42,757 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:42,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:42,758 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:43,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:43,069 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:43,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728268619] [2022-02-15 01:58:43,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1728268619] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:43,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:43,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:43,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350028270] [2022-02-15 01:58:43,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:43,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:43,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:43,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:43,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:43,070 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:44,206 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-15 01:58:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:44,206 INFO L225 Difference]: With dead ends: 302 [2022-02-15 01:58:44,206 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 01:58:44,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:44,207 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:44,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 01:58:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 215. [2022-02-15 01:58:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-15 01:58:44,561 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 66 [2022-02-15 01:58:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:44,561 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-15 01:58:44,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-15 01:58:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:44,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:44,561 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:44,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373 [2022-02-15 01:58:44,561 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:44,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:44,562 INFO L85 PathProgramCache]: Analyzing trace with hash 161725036, now seen corresponding path program 372 times [2022-02-15 01:58:44,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:44,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131191923] [2022-02-15 01:58:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:44,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:44,563 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:44,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:44,563 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:44,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:44,884 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:44,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131191923] [2022-02-15 01:58:44,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [131191923] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:44,884 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:44,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:44,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022206170] [2022-02-15 01:58:44,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:44,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:44,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:44,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:44,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:44,885 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:46,050 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-15 01:58:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:46,050 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:46,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:46,051 INFO L225 Difference]: With dead ends: 308 [2022-02-15 01:58:46,051 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 01:58:46,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:46,051 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:46,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 01:58:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 217. [2022-02-15 01:58:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-15 01:58:46,409 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 66 [2022-02-15 01:58:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:46,410 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-15 01:58:46,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-15 01:58:46,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:46,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:46,410 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:46,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374 [2022-02-15 01:58:46,410 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:46,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:46,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1851342356, now seen corresponding path program 373 times [2022-02-15 01:58:46,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:46,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562506729] [2022-02-15 01:58:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:46,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:46,411 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:46,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:46,412 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:46,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:46,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:46,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562506729] [2022-02-15 01:58:46,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1562506729] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:46,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:46,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:46,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221887024] [2022-02-15 01:58:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:46,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:46,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:46,727 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:47,898 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-15 01:58:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:47,898 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:47,898 INFO L225 Difference]: With dead ends: 314 [2022-02-15 01:58:47,898 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 01:58:47,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:47,899 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:47,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 01:58:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 219. [2022-02-15 01:58:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-15 01:58:48,265 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 66 [2022-02-15 01:58:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:48,265 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-15 01:58:48,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-15 01:58:48,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:48,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:48,265 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:48,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375 [2022-02-15 01:58:48,265 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:48,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash 621144428, now seen corresponding path program 374 times [2022-02-15 01:58:48,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:48,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349454276] [2022-02-15 01:58:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:48,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:48,267 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:48,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:48,267 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:48,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:48,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:48,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349454276] [2022-02-15 01:58:48,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1349454276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:48,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:48,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:48,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106570031] [2022-02-15 01:58:48,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:48,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:48,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:48,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:48,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:48,587 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:49,762 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-15 01:58:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:49,763 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:49,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:49,763 INFO L225 Difference]: With dead ends: 320 [2022-02-15 01:58:49,763 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 01:58:49,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:49,764 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:49,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 01:58:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 221. [2022-02-15 01:58:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-15 01:58:50,131 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 66 [2022-02-15 01:58:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:50,131 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-15 01:58:50,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-15 01:58:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:50,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:50,132 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:50,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376 [2022-02-15 01:58:50,132 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:50,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1564029164, now seen corresponding path program 375 times [2022-02-15 01:58:50,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:50,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509207620] [2022-02-15 01:58:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:50,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:50,133 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:50,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:50,133 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:50,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:50,449 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:50,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509207620] [2022-02-15 01:58:50,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509207620] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:50,449 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:50,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:50,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305804453] [2022-02-15 01:58:50,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:50,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:50,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:50,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:50,450 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:51,645 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-15 01:58:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:51,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:51,646 INFO L225 Difference]: With dead ends: 326 [2022-02-15 01:58:51,646 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 01:58:51,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:51,647 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:51,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 21 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 01:58:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 223. [2022-02-15 01:58:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-15 01:58:52,011 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 66 [2022-02-15 01:58:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:52,012 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-15 01:58:52,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-15 01:58:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:52,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:52,012 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:52,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377 [2022-02-15 01:58:52,012 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:52,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1438161004, now seen corresponding path program 376 times [2022-02-15 01:58:52,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:52,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104609308] [2022-02-15 01:58:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:52,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:52,013 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:52,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:52,014 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:52,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:52,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:52,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104609308] [2022-02-15 01:58:52,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [104609308] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:52,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:52,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:52,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045765317] [2022-02-15 01:58:52,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:52,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:52,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:52,331 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:53,522 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-15 01:58:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:53,523 INFO L225 Difference]: With dead ends: 332 [2022-02-15 01:58:53,523 INFO L226 Difference]: Without dead ends: 326 [2022-02-15 01:58:53,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:53,523 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:53,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 17 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-15 01:58:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 225. [2022-02-15 01:58:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-15 01:58:53,888 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 66 [2022-02-15 01:58:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:53,888 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-15 01:58:53,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:53,888 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-15 01:58:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:58:53,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:53,889 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:53,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable378 [2022-02-15 01:58:53,889 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash 737943532, now seen corresponding path program 377 times [2022-02-15 01:58:53,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:53,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898420924] [2022-02-15 01:58:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:53,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:53,890 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:53,891 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:54,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:54,207 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:54,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898420924] [2022-02-15 01:58:54,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [898420924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:54,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:54,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:58:54,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057837068] [2022-02-15 01:58:54,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:54,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:58:54,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:54,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:58:54,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:58:54,208 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:55,288 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 01:58:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:58:55,288 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:58:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:55,289 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:58:55,289 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 01:58:55,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1368, Invalid=2292, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:58:55,289 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:55,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 23 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 01:58:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 175. [2022-02-15 01:58:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.4823529411764707) internal successors, (252), 170 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2022-02-15 01:58:55,541 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 66 [2022-02-15 01:58:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:55,541 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2022-02-15 01:58:55,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2022-02-15 01:58:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:58:55,541 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:55,541 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:55,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379 [2022-02-15 01:58:55,542 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:55,542 INFO L85 PathProgramCache]: Analyzing trace with hash 951415631, now seen corresponding path program 378 times [2022-02-15 01:58:55,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:55,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327665824] [2022-02-15 01:58:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:55,543 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:55,543 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:55,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:55,543 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:55,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:55,883 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:55,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327665824] [2022-02-15 01:58:55,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [327665824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:55,884 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:55,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:58:55,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224663939] [2022-02-15 01:58:55,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:55,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:58:55,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:55,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:58:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:58:55,884 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:56,802 INFO L93 Difference]: Finished difference Result 190 states and 276 transitions. [2022-02-15 01:58:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:58:56,803 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:58:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:56,803 INFO L225 Difference]: With dead ends: 190 [2022-02-15 01:58:56,803 INFO L226 Difference]: Without dead ends: 184 [2022-02-15 01:58:56,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:58:56,803 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:56,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 17 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-15 01:58:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2022-02-15 01:58:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2022-02-15 01:58:57,061 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 68 [2022-02-15 01:58:57,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:57,061 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2022-02-15 01:58:57,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2022-02-15 01:58:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:58:57,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:57,061 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:57,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380 [2022-02-15 01:58:57,061 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:57,062 INFO L85 PathProgramCache]: Analyzing trace with hash -143533361, now seen corresponding path program 379 times [2022-02-15 01:58:57,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:57,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693475483] [2022-02-15 01:58:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:57,063 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:57,063 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:57,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:57,063 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:57,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:57,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:57,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693475483] [2022-02-15 01:58:57,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693475483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:57,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:57,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:58:57,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421754398] [2022-02-15 01:58:57,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:57,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:58:57,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:58:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:58:57,402 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:58,323 INFO L93 Difference]: Finished difference Result 194 states and 281 transitions. [2022-02-15 01:58:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:58:58,323 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:58:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:58,323 INFO L225 Difference]: With dead ends: 194 [2022-02-15 01:58:58,323 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:58:58,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:58:58,324 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:58,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:58:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2022-02-15 01:58:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 178 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 268 transitions. [2022-02-15 01:58:58,597 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 268 transitions. Word has length 68 [2022-02-15 01:58:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:58:58,597 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 268 transitions. [2022-02-15 01:58:58,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 268 transitions. [2022-02-15 01:58:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:58:58,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:58:58,598 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:58:58,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381 [2022-02-15 01:58:58,598 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:58:58,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:58:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash -122527153, now seen corresponding path program 380 times [2022-02-15 01:58:58,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:58:58,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661054496] [2022-02-15 01:58:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:58:58,599 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:58:58,599 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:58:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:58:58,600 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:58:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:58,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:58:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:58:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:58:58,940 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:58:58,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661054496] [2022-02-15 01:58:58,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [661054496] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:58:58,940 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:58:58,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:58:58,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685374956] [2022-02-15 01:58:58,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:58:58,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:58:58,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:58:58,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:58:58,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:58:58,941 INFO L87 Difference]: Start difference. First operand 183 states and 268 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:58:59,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:58:59,882 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:58:59,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:58:59,883 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:58:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:58:59,883 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:58:59,883 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:58:59,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:58:59,884 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:58:59,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:58:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:59:00,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2022-02-15 01:59:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-15 01:59:00,163 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 68 [2022-02-15 01:59:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:00,163 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-15 01:59:00,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-15 01:59:00,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:00,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:00,164 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:00,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382 [2022-02-15 01:59:00,164 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:00,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:00,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1410397745, now seen corresponding path program 381 times [2022-02-15 01:59:00,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:00,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616599236] [2022-02-15 01:59:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:00,165 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:00,165 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:00,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:00,166 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:00,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:00,505 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:00,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616599236] [2022-02-15 01:59:00,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616599236] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:00,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:00,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:00,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469982589] [2022-02-15 01:59:00,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:00,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:00,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:00,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:00,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:00,506 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:01,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:01,467 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:59:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:01,468 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:01,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:01,469 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:59:01,469 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:59:01,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:01,469 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:01,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 15 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:01,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:59:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 187. [2022-02-15 01:59:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-15 01:59:01,757 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 68 [2022-02-15 01:59:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:01,757 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-15 01:59:01,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-15 01:59:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:01,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:01,758 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:01,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383 [2022-02-15 01:59:01,758 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:01,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2103455409, now seen corresponding path program 382 times [2022-02-15 01:59:01,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:01,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863918053] [2022-02-15 01:59:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:01,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:01,759 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:01,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:01,760 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:02,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:02,097 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:02,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863918053] [2022-02-15 01:59:02,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863918053] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:02,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:02,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:02,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745806415] [2022-02-15 01:59:02,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:02,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:02,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:02,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:02,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:02,098 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:03,026 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:59:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:03,027 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:03,027 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:59:03,027 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:59:03,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:03,028 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:03,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:59:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 189. [2022-02-15 01:59:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-15 01:59:03,300 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 68 [2022-02-15 01:59:03,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:03,300 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-15 01:59:03,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-15 01:59:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:03,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:03,301 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:03,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384 [2022-02-15 01:59:03,301 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:03,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1883027663, now seen corresponding path program 383 times [2022-02-15 01:59:03,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:03,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178547705] [2022-02-15 01:59:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:03,302 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:03,302 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:03,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:03,303 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:03,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:03,631 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:03,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178547705] [2022-02-15 01:59:03,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1178547705] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:03,631 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:03,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:03,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359445938] [2022-02-15 01:59:03,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:03,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:03,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:03,632 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:04,570 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:59:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:04,571 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:59:04,571 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:59:04,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:04,572 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:04,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:59:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2022-02-15 01:59:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-15 01:59:04,851 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 68 [2022-02-15 01:59:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:04,851 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-15 01:59:04,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-15 01:59:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:04,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:04,851 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:04,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385 [2022-02-15 01:59:04,852 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:04,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1782431823, now seen corresponding path program 384 times [2022-02-15 01:59:04,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:04,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017351121] [2022-02-15 01:59:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:04,853 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:04,853 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:04,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:04,853 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:05,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:05,182 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:05,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017351121] [2022-02-15 01:59:05,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017351121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:05,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:05,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:05,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633265663] [2022-02-15 01:59:05,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:05,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:05,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:05,183 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:06,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:06,143 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:59:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:06,143 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:06,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:06,143 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:59:06,143 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:59:06,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:06,144 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:06,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 27 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:59:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 193. [2022-02-15 01:59:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-15 01:59:06,428 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 68 [2022-02-15 01:59:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:06,429 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-15 01:59:06,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-15 01:59:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:06,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:06,429 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:06,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386 [2022-02-15 01:59:06,429 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash -400889905, now seen corresponding path program 385 times [2022-02-15 01:59:06,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:06,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239796003] [2022-02-15 01:59:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:06,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:06,430 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:06,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:06,431 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:06,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:06,761 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:06,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239796003] [2022-02-15 01:59:06,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [239796003] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:06,761 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:06,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:06,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197860360] [2022-02-15 01:59:06,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:06,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:06,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:06,762 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:07,753 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:59:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:07,754 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:07,754 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:59:07,754 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:59:07,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:07,754 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:07,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:59:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 195. [2022-02-15 01:59:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-15 01:59:08,044 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 68 [2022-02-15 01:59:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:08,044 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-15 01:59:08,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-15 01:59:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:08,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:08,045 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:08,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387 [2022-02-15 01:59:08,045 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1665937231, now seen corresponding path program 386 times [2022-02-15 01:59:08,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:08,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005821123] [2022-02-15 01:59:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:08,046 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:08,046 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:08,046 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:08,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:08,378 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:08,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005821123] [2022-02-15 01:59:08,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2005821123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:08,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:08,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:08,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629194247] [2022-02-15 01:59:08,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:08,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:08,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:08,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:08,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:08,379 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:09,381 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:59:09,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:09,382 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:09,382 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:59:09,382 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:59:09,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:09,384 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:09,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 17 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:09,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:59:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 197. [2022-02-15 01:59:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-15 01:59:09,684 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 68 [2022-02-15 01:59:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:09,684 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-15 01:59:09,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:09,684 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-15 01:59:09,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:09,685 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:09,685 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:09,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388 [2022-02-15 01:59:09,685 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:09,685 INFO L85 PathProgramCache]: Analyzing trace with hash -683043121, now seen corresponding path program 387 times [2022-02-15 01:59:09,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:09,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292651965] [2022-02-15 01:59:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:09,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:09,686 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:09,687 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:10,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:10,017 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:10,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292651965] [2022-02-15 01:59:10,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292651965] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:10,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:10,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:10,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275666041] [2022-02-15 01:59:10,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:10,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:10,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:10,018 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:11,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:11,042 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 01:59:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:11,042 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:11,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:11,042 INFO L225 Difference]: With dead ends: 242 [2022-02-15 01:59:11,042 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:59:11,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:11,043 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:11,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:59:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 199. [2022-02-15 01:59:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-15 01:59:11,359 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 68 [2022-02-15 01:59:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:11,359 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-15 01:59:11,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-15 01:59:11,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:11,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:11,359 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:11,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable389 [2022-02-15 01:59:11,360 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:11,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1099636303, now seen corresponding path program 388 times [2022-02-15 01:59:11,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:11,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283410950] [2022-02-15 01:59:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:11,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:11,361 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:11,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:11,361 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:11,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:11,700 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:11,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283410950] [2022-02-15 01:59:11,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283410950] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:11,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:11,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:11,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286615694] [2022-02-15 01:59:11,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:11,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:11,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:11,701 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:12,746 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 01:59:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:12,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:12,747 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:59:12,747 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:59:12,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:12,747 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:12,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:59:13,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 201. [2022-02-15 01:59:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-15 01:59:13,064 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 68 [2022-02-15 01:59:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:13,064 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-15 01:59:13,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-15 01:59:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:13,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:13,064 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:13,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390 [2022-02-15 01:59:13,065 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:13,065 INFO L85 PathProgramCache]: Analyzing trace with hash 562611663, now seen corresponding path program 389 times [2022-02-15 01:59:13,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:13,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318086821] [2022-02-15 01:59:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:13,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:13,066 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:13,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:13,066 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:13,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:13,404 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:13,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318086821] [2022-02-15 01:59:13,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1318086821] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:13,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:13,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:13,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834128053] [2022-02-15 01:59:13,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:13,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:13,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:13,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:13,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:13,405 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:14,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:14,465 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 01:59:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:14,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:14,466 INFO L225 Difference]: With dead ends: 254 [2022-02-15 01:59:14,466 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:59:14,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:14,466 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:14,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:59:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 203. [2022-02-15 01:59:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-15 01:59:14,780 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 68 [2022-02-15 01:59:14,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:14,780 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-15 01:59:14,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:14,781 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-15 01:59:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:14,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:14,781 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:14,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391 [2022-02-15 01:59:14,781 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash -121991857, now seen corresponding path program 390 times [2022-02-15 01:59:14,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:14,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027636658] [2022-02-15 01:59:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:14,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:14,784 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:14,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:14,784 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:15,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:15,121 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:15,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027636658] [2022-02-15 01:59:15,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027636658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:15,121 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:15,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:15,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485008691] [2022-02-15 01:59:15,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:15,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:15,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:15,122 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:16,201 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 01:59:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:16,201 INFO L225 Difference]: With dead ends: 260 [2022-02-15 01:59:16,202 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 01:59:16,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:16,202 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:16,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 01:59:16,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 205. [2022-02-15 01:59:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-15 01:59:16,529 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 68 [2022-02-15 01:59:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:16,529 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-15 01:59:16,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-15 01:59:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:16,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:16,529 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:16,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392 [2022-02-15 01:59:16,529 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash -895978289, now seen corresponding path program 391 times [2022-02-15 01:59:16,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:16,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270093799] [2022-02-15 01:59:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:16,531 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:16,531 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:16,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:16,531 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:16,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:16,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:16,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270093799] [2022-02-15 01:59:16,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [270093799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:16,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:16,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:16,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037755347] [2022-02-15 01:59:16,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:16,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:16,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:16,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:16,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:16,910 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:18,001 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 01:59:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:18,001 INFO L225 Difference]: With dead ends: 266 [2022-02-15 01:59:18,001 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 01:59:18,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:18,002 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:18,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 01:59:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 207. [2022-02-15 01:59:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-15 01:59:18,337 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 68 [2022-02-15 01:59:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:18,337 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-15 01:59:18,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-15 01:59:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:18,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:18,337 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:18,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393 [2022-02-15 01:59:18,337 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1667597233, now seen corresponding path program 392 times [2022-02-15 01:59:18,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:18,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866364017] [2022-02-15 01:59:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:18,339 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:18,339 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:18,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:18,339 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:18,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:18,668 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:18,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866364017] [2022-02-15 01:59:18,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1866364017] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:18,669 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:18,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:18,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511873237] [2022-02-15 01:59:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:18,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:18,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:18,669 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:19,785 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 01:59:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:19,785 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:19,785 INFO L225 Difference]: With dead ends: 272 [2022-02-15 01:59:19,785 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 01:59:19,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:19,786 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:19,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 17 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 01:59:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 209. [2022-02-15 01:59:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-15 01:59:20,120 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 68 [2022-02-15 01:59:20,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:20,120 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-15 01:59:20,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-15 01:59:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:20,120 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:20,120 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:20,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394 [2022-02-15 01:59:20,120 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash -164060209, now seen corresponding path program 393 times [2022-02-15 01:59:20,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:20,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892116824] [2022-02-15 01:59:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:20,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:20,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:20,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:20,122 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:20,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:20,455 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:20,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892116824] [2022-02-15 01:59:20,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892116824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:20,455 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:20,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:20,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674938280] [2022-02-15 01:59:20,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:20,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:20,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:20,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:20,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:20,456 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:21,592 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 01:59:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:21,593 INFO L225 Difference]: With dead ends: 278 [2022-02-15 01:59:21,593 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 01:59:21,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:21,594 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:21,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 01:59:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 211. [2022-02-15 01:59:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-15 01:59:21,939 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 68 [2022-02-15 01:59:21,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:21,939 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-15 01:59:21,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:21,939 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-15 01:59:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:21,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:21,939 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:21,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395 [2022-02-15 01:59:21,939 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1626008399, now seen corresponding path program 394 times [2022-02-15 01:59:21,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:21,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657837730] [2022-02-15 01:59:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:21,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:21,940 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:21,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:21,941 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:22,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:22,281 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:22,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657837730] [2022-02-15 01:59:22,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [657837730] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:22,281 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:22,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:22,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539430792] [2022-02-15 01:59:22,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:22,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:22,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:22,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:22,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:22,282 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:23,417 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 01:59:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:23,418 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:23,418 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:59:23,418 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 01:59:23,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:23,418 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:23,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 15 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 01:59:23,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 213. [2022-02-15 01:59:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-15 01:59:23,766 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 68 [2022-02-15 01:59:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:23,766 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-15 01:59:23,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-15 01:59:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:23,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:23,766 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:23,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396 [2022-02-15 01:59:23,766 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:23,767 INFO L85 PathProgramCache]: Analyzing trace with hash -399945009, now seen corresponding path program 395 times [2022-02-15 01:59:23,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:23,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270158740] [2022-02-15 01:59:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:23,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:23,768 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:23,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:23,768 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:24,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:24,098 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:24,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270158740] [2022-02-15 01:59:24,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [270158740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:24,098 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:24,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:24,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125045385] [2022-02-15 01:59:24,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:24,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:24,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:24,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:24,099 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:25,258 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-15 01:59:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:25,258 INFO L225 Difference]: With dead ends: 290 [2022-02-15 01:59:25,258 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 01:59:25,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:25,259 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:25,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 01:59:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 215. [2022-02-15 01:59:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-15 01:59:25,612 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 68 [2022-02-15 01:59:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:25,613 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-15 01:59:25,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-15 01:59:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:25,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:25,613 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:25,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397 [2022-02-15 01:59:25,613 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:25,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1720985009, now seen corresponding path program 396 times [2022-02-15 01:59:25,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:25,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408003338] [2022-02-15 01:59:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:25,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:25,614 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:25,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:25,615 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:25,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:25,945 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:25,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408003338] [2022-02-15 01:59:25,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [408003338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:25,945 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:25,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:25,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054099365] [2022-02-15 01:59:25,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:25,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:25,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:25,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:25,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:25,946 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:27,121 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-15 01:59:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:27,121 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:27,122 INFO L225 Difference]: With dead ends: 296 [2022-02-15 01:59:27,122 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 01:59:27,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:27,122 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:27,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 01:59:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 217. [2022-02-15 01:59:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-15 01:59:27,481 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 68 [2022-02-15 01:59:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:27,481 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-15 01:59:27,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-15 01:59:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:27,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:27,482 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:27,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398 [2022-02-15 01:59:27,482 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash 69894607, now seen corresponding path program 397 times [2022-02-15 01:59:27,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:27,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629314098] [2022-02-15 01:59:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:27,483 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:27,483 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:27,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:27,484 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:27,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:27,817 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:27,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629314098] [2022-02-15 01:59:27,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [629314098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:27,817 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:27,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:27,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325892959] [2022-02-15 01:59:27,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:27,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:27,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:27,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:27,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:27,818 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:29,000 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-15 01:59:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:29,000 INFO L225 Difference]: With dead ends: 302 [2022-02-15 01:59:29,000 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 01:59:29,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:29,001 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:29,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 01:59:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 219. [2022-02-15 01:59:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-15 01:59:29,367 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 68 [2022-02-15 01:59:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:29,367 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-15 01:59:29,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-15 01:59:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:29,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:29,367 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:29,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399 [2022-02-15 01:59:29,368 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1176680113, now seen corresponding path program 398 times [2022-02-15 01:59:29,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:29,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096713765] [2022-02-15 01:59:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:29,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:29,369 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:29,369 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:29,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:29,698 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:29,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096713765] [2022-02-15 01:59:29,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2096713765] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:29,698 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:29,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:29,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501542556] [2022-02-15 01:59:29,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:29,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:29,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:29,699 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:30,883 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-15 01:59:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:30,883 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:30,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:30,884 INFO L225 Difference]: With dead ends: 308 [2022-02-15 01:59:30,884 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 01:59:30,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:30,884 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:30,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 01:59:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 221. [2022-02-15 01:59:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-15 01:59:31,257 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 68 [2022-02-15 01:59:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:31,257 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-15 01:59:31,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:31,257 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-15 01:59:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:31,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:31,258 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:31,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400 [2022-02-15 01:59:31,258 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:31,258 INFO L85 PathProgramCache]: Analyzing trace with hash -839110449, now seen corresponding path program 399 times [2022-02-15 01:59:31,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:31,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387178123] [2022-02-15 01:59:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:31,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:31,259 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:31,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:31,260 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:31,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:31,597 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:31,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387178123] [2022-02-15 01:59:31,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387178123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:31,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:31,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:31,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463398688] [2022-02-15 01:59:31,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:31,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:31,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:31,598 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:32,821 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-15 01:59:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:32,821 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:32,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:32,822 INFO L225 Difference]: With dead ends: 314 [2022-02-15 01:59:32,822 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 01:59:32,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:32,822 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:32,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 01:59:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 223. [2022-02-15 01:59:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-15 01:59:33,213 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 68 [2022-02-15 01:59:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:33,213 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-15 01:59:33,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-15 01:59:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:33,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:33,214 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:33,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401 [2022-02-15 01:59:33,214 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:33,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1442789455, now seen corresponding path program 400 times [2022-02-15 01:59:33,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:33,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509222177] [2022-02-15 01:59:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:33,215 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:33,215 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:33,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:33,216 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:33,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:33,549 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:33,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509222177] [2022-02-15 01:59:33,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509222177] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:33,549 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:33,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:33,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363344266] [2022-02-15 01:59:33,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:33,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:33,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:33,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:33,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:33,550 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:34,794 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-15 01:59:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:34,794 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:34,795 INFO L225 Difference]: With dead ends: 320 [2022-02-15 01:59:34,795 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 01:59:34,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:34,795 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:34,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:34,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 01:59:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 225. [2022-02-15 01:59:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-15 01:59:35,181 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 68 [2022-02-15 01:59:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:35,181 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-15 01:59:35,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-15 01:59:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:35,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:35,182 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:35,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402 [2022-02-15 01:59:35,182 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:35,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:35,182 INFO L85 PathProgramCache]: Analyzing trace with hash -379691057, now seen corresponding path program 401 times [2022-02-15 01:59:35,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:35,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123786736] [2022-02-15 01:59:35,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:35,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:35,183 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:35,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:35,184 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:35,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:35,531 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:35,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123786736] [2022-02-15 01:59:35,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1123786736] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:35,531 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:35,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:35,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013039791] [2022-02-15 01:59:35,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:35,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:35,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:35,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:35,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:35,532 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:36,789 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-15 01:59:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:36,790 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:36,790 INFO L225 Difference]: With dead ends: 326 [2022-02-15 01:59:36,790 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 01:59:36,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:36,790 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:36,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 21 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:36,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 01:59:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 227. [2022-02-15 01:59:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-15 01:59:37,190 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 68 [2022-02-15 01:59:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:37,191 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-15 01:59:37,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-15 01:59:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:37,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:37,191 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:37,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403 [2022-02-15 01:59:37,191 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash 563193679, now seen corresponding path program 402 times [2022-02-15 01:59:37,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:37,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995691406] [2022-02-15 01:59:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:37,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:37,192 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:37,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:37,193 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:37,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:37,527 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:37,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995691406] [2022-02-15 01:59:37,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [995691406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:37,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:37,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:37,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728315160] [2022-02-15 01:59:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:37,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:37,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:37,528 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:38,789 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-15 01:59:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:38,789 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:38,789 INFO L225 Difference]: With dead ends: 332 [2022-02-15 01:59:38,789 INFO L226 Difference]: Without dead ends: 326 [2022-02-15 01:59:38,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:38,790 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:38,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 27 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:38,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-15 01:59:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2022-02-15 01:59:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-15 01:59:39,193 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 68 [2022-02-15 01:59:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:39,194 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-15 01:59:39,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-15 01:59:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:39,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:39,194 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:39,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404 [2022-02-15 01:59:39,194 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash 437325519, now seen corresponding path program 403 times [2022-02-15 01:59:39,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:39,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011628945] [2022-02-15 01:59:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:39,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:39,195 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:39,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:39,196 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:39,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:39,534 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:39,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011628945] [2022-02-15 01:59:39,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011628945] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:39,534 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:39,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:39,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933051275] [2022-02-15 01:59:39,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:39,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:39,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:39,535 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:40,786 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-15 01:59:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:40,786 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:40,786 INFO L225 Difference]: With dead ends: 338 [2022-02-15 01:59:40,786 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 01:59:40,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:40,787 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:40,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 19 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 01:59:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 231. [2022-02-15 01:59:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-15 01:59:41,183 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 68 [2022-02-15 01:59:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:41,183 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-15 01:59:41,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:41,184 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-15 01:59:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:41,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:41,184 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:41,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405 [2022-02-15 01:59:41,184 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash -262891953, now seen corresponding path program 404 times [2022-02-15 01:59:41,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:41,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306027278] [2022-02-15 01:59:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:41,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:41,185 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:41,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:41,186 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:41,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:41,520 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:41,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306027278] [2022-02-15 01:59:41,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [306027278] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:41,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:41,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:41,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923664029] [2022-02-15 01:59:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:41,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:41,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:41,521 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:42,806 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-15 01:59:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:42,806 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:42,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:42,807 INFO L225 Difference]: With dead ends: 344 [2022-02-15 01:59:42,807 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 01:59:42,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:42,807 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:42,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 25 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 01:59:43,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 233. [2022-02-15 01:59:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-15 01:59:43,202 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 68 [2022-02-15 01:59:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:43,202 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-15 01:59:43,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-15 01:59:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:43,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:43,203 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:43,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406 [2022-02-15 01:59:43,203 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:43,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:43,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1137982927, now seen corresponding path program 405 times [2022-02-15 01:59:43,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:43,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276251342] [2022-02-15 01:59:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:43,204 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:43,204 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:43,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:43,205 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:43,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:43,542 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:43,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276251342] [2022-02-15 01:59:43,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1276251342] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:43,542 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:43,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:59:43,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026672622] [2022-02-15 01:59:43,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:43,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:43,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:43,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:43,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:43,543 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:44,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:44,705 INFO L93 Difference]: Finished difference Result 294 states and 431 transitions. [2022-02-15 01:59:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:59:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:59:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:44,706 INFO L225 Difference]: With dead ends: 294 [2022-02-15 01:59:44,706 INFO L226 Difference]: Without dead ends: 288 [2022-02-15 01:59:44,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1460, Invalid=2446, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:44,706 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:44,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 23 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-15 01:59:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 181. [2022-02-15 01:59:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-02-15 01:59:44,970 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 68 [2022-02-15 01:59:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:44,971 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-02-15 01:59:44,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-02-15 01:59:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:59:44,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:44,971 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:44,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407 [2022-02-15 01:59:44,971 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:44,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1221188850, now seen corresponding path program 406 times [2022-02-15 01:59:44,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:44,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042434841] [2022-02-15 01:59:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:44,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:44,972 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:44,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:44,973 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:45,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:45,327 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:45,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042434841] [2022-02-15 01:59:45,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042434841] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:45,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:45,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:45,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716469086] [2022-02-15 01:59:45,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:45,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:59:45,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:59:45,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:59:45,328 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:46,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:46,292 INFO L93 Difference]: Finished difference Result 196 states and 285 transitions. [2022-02-15 01:59:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:59:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:59:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:46,293 INFO L225 Difference]: With dead ends: 196 [2022-02-15 01:59:46,293 INFO L226 Difference]: Without dead ends: 190 [2022-02-15 01:59:46,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:59:46,293 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:46,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 21 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-15 01:59:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2022-02-15 01:59:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4833333333333334) internal successors, (267), 180 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2022-02-15 01:59:46,571 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 70 [2022-02-15 01:59:46,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:46,571 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2022-02-15 01:59:46,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:46,571 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2022-02-15 01:59:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:59:46,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:46,571 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:46,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408 [2022-02-15 01:59:46,572 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash 126239858, now seen corresponding path program 407 times [2022-02-15 01:59:46,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:46,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601003182] [2022-02-15 01:59:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:46,573 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:46,573 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:46,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:46,573 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:46,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:46,927 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:46,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601003182] [2022-02-15 01:59:46,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601003182] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:46,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:46,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:46,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212699808] [2022-02-15 01:59:46,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:46,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:59:46,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:46,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:59:46,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:59:46,929 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:47,902 INFO L93 Difference]: Finished difference Result 200 states and 290 transitions. [2022-02-15 01:59:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:59:47,902 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:59:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:47,902 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:59:47,902 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:59:47,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:59:47,903 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:47,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 29 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:59:48,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2022-02-15 01:59:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.483695652173913) internal successors, (273), 184 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 277 transitions. [2022-02-15 01:59:48,193 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 277 transitions. Word has length 70 [2022-02-15 01:59:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:48,193 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 277 transitions. [2022-02-15 01:59:48,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 277 transitions. [2022-02-15 01:59:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:59:48,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:48,194 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:48,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409 [2022-02-15 01:59:48,194 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:48,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:48,194 INFO L85 PathProgramCache]: Analyzing trace with hash 147246066, now seen corresponding path program 408 times [2022-02-15 01:59:48,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:48,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537471708] [2022-02-15 01:59:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:48,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:48,195 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:48,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:48,196 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:48,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:48,554 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:48,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537471708] [2022-02-15 01:59:48,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1537471708] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:48,554 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:48,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:48,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652801320] [2022-02-15 01:59:48,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:48,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:59:48,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:48,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:59:48,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:59:48,555 INFO L87 Difference]: Start difference. First operand 189 states and 277 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:49,544 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 01:59:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:59:49,544 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:59:49,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:49,544 INFO L225 Difference]: With dead ends: 206 [2022-02-15 01:59:49,544 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:59:49,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:59:49,545 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:49,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 17 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:59:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 191. [2022-02-15 01:59:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-15 01:59:49,843 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 70 [2022-02-15 01:59:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:49,843 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-15 01:59:49,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-15 01:59:49,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:59:49,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:49,843 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:49,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410 [2022-02-15 01:59:49,844 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1140624526, now seen corresponding path program 409 times [2022-02-15 01:59:49,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:49,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931707682] [2022-02-15 01:59:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:49,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:49,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:49,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:49,845 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:50,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:50,203 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:50,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931707682] [2022-02-15 01:59:50,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [931707682] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:50,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:50,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:50,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803122649] [2022-02-15 01:59:50,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:50,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:59:50,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:50,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:59:50,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:59:50,205 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:51,211 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 01:59:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:59:51,212 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:59:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:51,212 INFO L225 Difference]: With dead ends: 212 [2022-02-15 01:59:51,212 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:59:51,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:59:51,212 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:51,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:51,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:59:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 193. [2022-02-15 01:59:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-15 01:59:51,525 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 70 [2022-02-15 01:59:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:51,525 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-15 01:59:51,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-15 01:59:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:59:51,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:51,526 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:51,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411 [2022-02-15 01:59:51,526 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:51,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:51,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1833682190, now seen corresponding path program 410 times [2022-02-15 01:59:51,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:51,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35296368] [2022-02-15 01:59:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:51,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:51,527 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:51,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:51,528 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:51,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:51,884 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:51,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35296368] [2022-02-15 01:59:51,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [35296368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:51,884 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:51,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:51,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990393240] [2022-02-15 01:59:51,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:51,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:59:51,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:51,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:59:51,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:59:51,885 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:52,938 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 01:59:52,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:59:52,938 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:59:52,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:52,939 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:59:52,939 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:59:52,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:59:52,939 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:52,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:59:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 195. [2022-02-15 01:59:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-15 01:59:53,245 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 70 [2022-02-15 01:59:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:53,245 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-15 01:59:53,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:53,245 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-15 01:59:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:59:53,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:53,245 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:53,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412 [2022-02-15 01:59:53,246 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:53,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2142166414, now seen corresponding path program 411 times [2022-02-15 01:59:53,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:53,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470654419] [2022-02-15 01:59:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:53,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:53,247 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:53,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:53,247 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:53,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:53,603 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:53,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470654419] [2022-02-15 01:59:53,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470654419] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:53,603 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:53,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:53,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780261776] [2022-02-15 01:59:53,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:53,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:59:53,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:53,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:59:53,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:59:53,604 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:54,629 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 01:59:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:59:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:59:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:54,630 INFO L225 Difference]: With dead ends: 224 [2022-02-15 01:59:54,630 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:59:54,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:59:54,630 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:54,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:59:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 197. [2022-02-15 01:59:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-15 01:59:54,943 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 70 [2022-02-15 01:59:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:54,943 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-15 01:59:54,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-15 01:59:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:59:54,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:54,943 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:54,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413 [2022-02-15 01:59:54,943 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:54,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2052205042, now seen corresponding path program 412 times [2022-02-15 01:59:54,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:54,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124409704] [2022-02-15 01:59:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:54,944 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:54,944 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:54,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:54,945 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:55,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:55,304 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:55,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124409704] [2022-02-15 01:59:55,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [124409704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:55,305 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:55,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:55,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47913363] [2022-02-15 01:59:55,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:55,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:59:55,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:59:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:59:55,305 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:56,350 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 01:59:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:59:56,350 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:59:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:56,351 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:59:56,351 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:59:56,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:59:56,351 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:56,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:59:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 199. [2022-02-15 01:59:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-15 01:59:56,674 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 70 [2022-02-15 01:59:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:56,675 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-15 01:59:56,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:56,675 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-15 01:59:56,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:59:56,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:56,675 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:56,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414 [2022-02-15 01:59:56,675 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:56,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:56,675 INFO L85 PathProgramCache]: Analyzing trace with hash -131116686, now seen corresponding path program 413 times [2022-02-15 01:59:56,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:56,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15491374] [2022-02-15 01:59:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:56,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:56,679 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:56,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:56,680 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:57,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:57,041 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:57,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15491374] [2022-02-15 01:59:57,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [15491374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:57,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:57,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:57,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099300680] [2022-02-15 01:59:57,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:57,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:59:57,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:57,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:59:57,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:59:57,042 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:58,110 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 01:59:58,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:59:58,110 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:59:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:58,111 INFO L225 Difference]: With dead ends: 236 [2022-02-15 01:59:58,111 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:59:58,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:59:58,111 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:58,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 31 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:59:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 201. [2022-02-15 01:59:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-15 01:59:58,438 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 70 [2022-02-15 01:59:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:58,438 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-15 01:59:58,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:58,438 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-15 01:59:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:59:58,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:58,439 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:58,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415 [2022-02-15 01:59:58,439 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:58,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1935710450, now seen corresponding path program 414 times [2022-02-15 01:59:58,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:58,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492913515] [2022-02-15 01:59:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:58,440 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:59:58,440 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:59:58,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:58,440 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:58,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:58,793 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:58,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492913515] [2022-02-15 01:59:58,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492913515] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:58,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:58,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:58,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036504194] [2022-02-15 01:59:58,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:58,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:59:58,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:58,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:59:58,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:59:58,794 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:59,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:59,882 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 01:59:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:59:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 01:59:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:59,883 INFO L225 Difference]: With dead ends: 242 [2022-02-15 01:59:59,883 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:59:59,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:59:59,883 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:59,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 02:00:00,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 203. [2022-02-15 02:00:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-15 02:00:00,221 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 70 [2022-02-15 02:00:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:00,221 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-15 02:00:00,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-15 02:00:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:00,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:00,222 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:00,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416 [2022-02-15 02:00:00,222 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash -413269902, now seen corresponding path program 415 times [2022-02-15 02:00:00,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:00,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38573365] [2022-02-15 02:00:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:00,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:00,223 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:00,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:00,223 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:00,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:00,578 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:00,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38573365] [2022-02-15 02:00:00,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [38573365] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:00,578 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:00,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:00,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655379244] [2022-02-15 02:00:00,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:00,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:00,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:00,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:00,579 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:01,823 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 02:00:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:01,824 INFO L225 Difference]: With dead ends: 248 [2022-02-15 02:00:01,824 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 02:00:01,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:01,824 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:01,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 02:00:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 205. [2022-02-15 02:00:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-15 02:00:02,169 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 70 [2022-02-15 02:00:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:02,169 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-15 02:00:02,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-15 02:00:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:02,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:02,170 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:02,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417 [2022-02-15 02:00:02,170 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1369409522, now seen corresponding path program 416 times [2022-02-15 02:00:02,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:02,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304103913] [2022-02-15 02:00:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:02,172 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:02,172 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:02,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:02,173 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:02,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:02,540 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:02,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304103913] [2022-02-15 02:00:02,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [304103913] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:02,540 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:02,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:02,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992259185] [2022-02-15 02:00:02,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:02,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:02,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:02,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:02,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:02,541 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:03,688 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 02:00:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:03,688 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:03,689 INFO L225 Difference]: With dead ends: 254 [2022-02-15 02:00:03,689 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 02:00:03,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:03,689 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:03,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 02:00:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 207. [2022-02-15 02:00:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-15 02:00:04,046 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 70 [2022-02-15 02:00:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:04,046 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-15 02:00:04,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-15 02:00:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:04,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:04,046 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:04,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418 [2022-02-15 02:00:04,046 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:04,047 INFO L85 PathProgramCache]: Analyzing trace with hash 832384882, now seen corresponding path program 417 times [2022-02-15 02:00:04,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:04,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880892073] [2022-02-15 02:00:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:04,048 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:04,048 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:04,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:04,048 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:04,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:04,413 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:04,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880892073] [2022-02-15 02:00:04,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880892073] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:04,413 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:04,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:04,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80690221] [2022-02-15 02:00:04,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:04,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:04,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:04,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:04,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:04,414 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:05,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:05,660 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 02:00:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:05,660 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:05,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:05,660 INFO L225 Difference]: With dead ends: 260 [2022-02-15 02:00:05,661 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 02:00:05,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:05,661 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:05,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:00:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 02:00:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2022-02-15 02:00:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-15 02:00:06,038 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 70 [2022-02-15 02:00:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:06,038 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-15 02:00:06,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-15 02:00:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:06,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:06,038 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:06,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419 [2022-02-15 02:00:06,038 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash 147781362, now seen corresponding path program 418 times [2022-02-15 02:00:06,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:06,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222049612] [2022-02-15 02:00:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:06,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:06,040 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:06,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:06,040 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:06,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:06,436 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:06,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222049612] [2022-02-15 02:00:06,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [222049612] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:06,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:06,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:06,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057179500] [2022-02-15 02:00:06,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:06,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:06,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:06,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:06,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:06,437 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:07,632 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 02:00:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:07,633 INFO L225 Difference]: With dead ends: 266 [2022-02-15 02:00:07,633 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 02:00:07,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:07,633 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:07,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 02:00:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 211. [2022-02-15 02:00:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-15 02:00:07,999 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 70 [2022-02-15 02:00:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:07,999 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-15 02:00:07,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-15 02:00:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:07,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:07,999 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:08,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420 [2022-02-15 02:00:08,000 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash -626205070, now seen corresponding path program 419 times [2022-02-15 02:00:08,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:08,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924419425] [2022-02-15 02:00:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:08,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:08,001 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:08,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:08,001 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:08,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:08,363 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:08,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924419425] [2022-02-15 02:00:08,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [924419425] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:08,363 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:08,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:08,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511160237] [2022-02-15 02:00:08,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:08,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:08,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:08,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:08,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:08,364 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:09,563 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 02:00:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:09,563 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:09,564 INFO L225 Difference]: With dead ends: 272 [2022-02-15 02:00:09,564 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 02:00:09,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:09,564 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:09,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 02:00:09,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 213. [2022-02-15 02:00:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-15 02:00:09,942 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 70 [2022-02-15 02:00:09,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:09,942 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-15 02:00:09,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:09,942 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-15 02:00:09,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:09,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:09,943 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:09,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421 [2022-02-15 02:00:09,943 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1397824014, now seen corresponding path program 420 times [2022-02-15 02:00:09,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:09,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138900451] [2022-02-15 02:00:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:09,944 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:09,944 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:09,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:09,945 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:10,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:10,307 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:10,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138900451] [2022-02-15 02:00:10,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2138900451] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:10,308 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:10,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:10,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736636815] [2022-02-15 02:00:10,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:10,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:10,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:10,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:10,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:10,308 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:11,521 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 02:00:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:11,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:11,522 INFO L225 Difference]: With dead ends: 278 [2022-02-15 02:00:11,522 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 02:00:11,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:11,522 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:11,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 02:00:11,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 215. [2022-02-15 02:00:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-15 02:00:11,908 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 70 [2022-02-15 02:00:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:11,909 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-15 02:00:11,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:11,909 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-15 02:00:11,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:11,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:11,909 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:11,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422 [2022-02-15 02:00:11,909 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:11,909 INFO L85 PathProgramCache]: Analyzing trace with hash 105713010, now seen corresponding path program 421 times [2022-02-15 02:00:11,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:11,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304702325] [2022-02-15 02:00:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:11,910 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:11,910 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:11,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:11,911 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:12,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:12,274 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:12,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304702325] [2022-02-15 02:00:12,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304702325] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:12,274 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:12,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:12,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689163577] [2022-02-15 02:00:12,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:12,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:12,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:12,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:12,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:12,275 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:13,537 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 02:00:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:13,537 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:13,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:13,538 INFO L225 Difference]: With dead ends: 284 [2022-02-15 02:00:13,538 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 02:00:13,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:13,538 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:13,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 02:00:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 217. [2022-02-15 02:00:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-15 02:00:13,938 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 70 [2022-02-15 02:00:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:13,939 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-15 02:00:13,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-15 02:00:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:13,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:13,939 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:13,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423 [2022-02-15 02:00:13,939 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1895781618, now seen corresponding path program 422 times [2022-02-15 02:00:13,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:13,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199192777] [2022-02-15 02:00:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:13,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:13,940 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:13,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:13,941 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:14,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:14,309 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:14,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199192777] [2022-02-15 02:00:14,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199192777] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:14,309 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:14,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:14,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810583622] [2022-02-15 02:00:14,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:14,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:14,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:14,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:14,310 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:15,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:15,575 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-15 02:00:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:15,576 INFO L225 Difference]: With dead ends: 290 [2022-02-15 02:00:15,576 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 02:00:15,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:15,576 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:15,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 02:00:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 219. [2022-02-15 02:00:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-15 02:00:15,967 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 70 [2022-02-15 02:00:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:15,967 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-15 02:00:15,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-15 02:00:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:15,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:15,968 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:15,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424 [2022-02-15 02:00:15,968 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:15,968 INFO L85 PathProgramCache]: Analyzing trace with hash -130171790, now seen corresponding path program 423 times [2022-02-15 02:00:15,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:15,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247472120] [2022-02-15 02:00:15,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:15,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:15,969 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:15,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:15,970 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:16,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:16,344 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:16,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247472120] [2022-02-15 02:00:16,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [247472120] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:16,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:16,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:16,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999450504] [2022-02-15 02:00:16,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:16,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:16,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:16,345 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:17,615 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-15 02:00:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:17,615 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:17,616 INFO L225 Difference]: With dead ends: 296 [2022-02-15 02:00:17,616 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 02:00:17,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:17,616 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:17,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 24 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:17,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 02:00:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 221. [2022-02-15 02:00:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-15 02:00:18,019 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 70 [2022-02-15 02:00:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:18,019 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-15 02:00:18,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-15 02:00:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:18,020 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:18,020 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:18,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425 [2022-02-15 02:00:18,020 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:18,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:18,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1451211790, now seen corresponding path program 424 times [2022-02-15 02:00:18,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:18,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904609736] [2022-02-15 02:00:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:18,021 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:18,021 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:18,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:18,022 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:18,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:18,383 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:18,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904609736] [2022-02-15 02:00:18,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904609736] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:18,383 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:18,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:18,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088102159] [2022-02-15 02:00:18,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:18,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:18,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:18,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:18,384 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:19,672 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-15 02:00:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:19,673 INFO L225 Difference]: With dead ends: 302 [2022-02-15 02:00:19,673 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 02:00:19,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:19,674 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:19,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:19,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 02:00:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 223. [2022-02-15 02:00:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-15 02:00:20,076 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 70 [2022-02-15 02:00:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:20,076 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-15 02:00:20,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-15 02:00:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:20,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:20,077 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:20,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426 [2022-02-15 02:00:20,077 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash 339667826, now seen corresponding path program 425 times [2022-02-15 02:00:20,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:20,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461487062] [2022-02-15 02:00:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:20,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:20,078 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:20,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:20,079 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:20,445 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:20,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461487062] [2022-02-15 02:00:20,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1461487062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:20,445 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:20,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:20,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228622971] [2022-02-15 02:00:20,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:20,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:20,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:20,446 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:21,775 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-15 02:00:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:21,776 INFO L225 Difference]: With dead ends: 308 [2022-02-15 02:00:21,776 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 02:00:21,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:21,776 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:21,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 02:00:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 225. [2022-02-15 02:00:22,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-15 02:00:22,202 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 70 [2022-02-15 02:00:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:22,202 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-15 02:00:22,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-15 02:00:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:22,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:22,203 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:22,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427 [2022-02-15 02:00:22,203 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:22,203 INFO L85 PathProgramCache]: Analyzing trace with hash -906906894, now seen corresponding path program 426 times [2022-02-15 02:00:22,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:22,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151473753] [2022-02-15 02:00:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:22,204 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:22,204 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:22,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:22,205 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:22,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:22,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:22,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151473753] [2022-02-15 02:00:22,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151473753] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:22,571 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:22,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:22,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7431372] [2022-02-15 02:00:22,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:22,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:22,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:22,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:22,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:22,571 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:23,907 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-15 02:00:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:23,908 INFO L225 Difference]: With dead ends: 314 [2022-02-15 02:00:23,908 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 02:00:23,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:23,908 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:23,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 02:00:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 227. [2022-02-15 02:00:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-15 02:00:24,328 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 70 [2022-02-15 02:00:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:24,329 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-15 02:00:24,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:24,330 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-15 02:00:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:24,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:24,330 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:24,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428 [2022-02-15 02:00:24,330 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:24,330 INFO L85 PathProgramCache]: Analyzing trace with hash -569337230, now seen corresponding path program 427 times [2022-02-15 02:00:24,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:24,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905144282] [2022-02-15 02:00:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:24,331 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:24,331 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:24,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:24,332 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:24,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:24,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:24,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905144282] [2022-02-15 02:00:24,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [905144282] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:24,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:24,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:24,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949147398] [2022-02-15 02:00:24,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:24,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:24,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:24,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:24,696 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:26,039 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-15 02:00:26,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:26,040 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:26,040 INFO L225 Difference]: With dead ends: 320 [2022-02-15 02:00:26,040 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 02:00:26,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:26,041 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:26,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 27 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 02:00:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 229. [2022-02-15 02:00:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-15 02:00:26,464 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 70 [2022-02-15 02:00:26,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:26,464 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-15 02:00:26,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-15 02:00:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:26,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:26,465 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:26,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429 [2022-02-15 02:00:26,465 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1712562674, now seen corresponding path program 428 times [2022-02-15 02:00:26,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:26,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114538896] [2022-02-15 02:00:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:26,466 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:26,466 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:26,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:26,466 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:26,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:26,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:26,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114538896] [2022-02-15 02:00:26,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114538896] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:26,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:26,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:26,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116283938] [2022-02-15 02:00:26,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:26,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:26,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:26,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:26,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:26,831 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:28,182 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-15 02:00:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:28,182 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:28,183 INFO L225 Difference]: With dead ends: 326 [2022-02-15 02:00:28,183 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 02:00:28,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:28,183 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:28,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 21 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 02:00:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 231. [2022-02-15 02:00:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-15 02:00:28,615 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 70 [2022-02-15 02:00:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:28,615 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-15 02:00:28,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-15 02:00:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:28,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:28,616 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:28,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430 [2022-02-15 02:00:28,616 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash -109917838, now seen corresponding path program 429 times [2022-02-15 02:00:28,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:28,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355749634] [2022-02-15 02:00:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:28,617 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:28,617 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:28,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:28,617 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:28,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:28,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:28,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355749634] [2022-02-15 02:00:28,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [355749634] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:28,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:28,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:28,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567191729] [2022-02-15 02:00:28,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:28,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:28,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:28,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:28,981 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:30,371 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-15 02:00:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:30,372 INFO L225 Difference]: With dead ends: 332 [2022-02-15 02:00:30,372 INFO L226 Difference]: Without dead ends: 326 [2022-02-15 02:00:30,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:30,373 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:30,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 27 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-15 02:00:30,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 233. [2022-02-15 02:00:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-15 02:00:30,809 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 70 [2022-02-15 02:00:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:30,809 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-15 02:00:30,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-15 02:00:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:30,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:30,809 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:30,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431 [2022-02-15 02:00:30,809 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:30,810 INFO L85 PathProgramCache]: Analyzing trace with hash 832966898, now seen corresponding path program 430 times [2022-02-15 02:00:30,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:30,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370161383] [2022-02-15 02:00:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:30,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:30,811 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:30,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:30,811 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:31,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:31,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:31,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370161383] [2022-02-15 02:00:31,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [370161383] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:31,178 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:31,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:31,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958045018] [2022-02-15 02:00:31,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:31,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:31,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:31,178 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:32,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:32,545 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-15 02:00:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:32,545 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:32,546 INFO L225 Difference]: With dead ends: 338 [2022-02-15 02:00:32,546 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 02:00:32,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:32,546 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:32,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 02:00:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 235. [2022-02-15 02:00:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-02-15 02:00:32,984 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 70 [2022-02-15 02:00:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:32,984 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-02-15 02:00:32,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-02-15 02:00:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:32,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:32,985 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:32,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable432 [2022-02-15 02:00:32,985 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash 707098738, now seen corresponding path program 431 times [2022-02-15 02:00:32,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:32,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688936134] [2022-02-15 02:00:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:32,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:32,986 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:32,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:32,987 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:33,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:33,348 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:33,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688936134] [2022-02-15 02:00:33,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [688936134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:33,348 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:33,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:33,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311623143] [2022-02-15 02:00:33,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:33,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:33,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:33,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:33,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:33,349 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:34,729 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-15 02:00:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:34,729 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:34,729 INFO L225 Difference]: With dead ends: 344 [2022-02-15 02:00:34,729 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 02:00:34,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:34,730 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:34,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 02:00:35,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 237. [2022-02-15 02:00:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-02-15 02:00:35,172 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 70 [2022-02-15 02:00:35,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:35,172 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-02-15 02:00:35,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-02-15 02:00:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:35,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:35,173 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:35,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable433 [2022-02-15 02:00:35,173 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:35,173 INFO L85 PathProgramCache]: Analyzing trace with hash 6881266, now seen corresponding path program 432 times [2022-02-15 02:00:35,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:35,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505533163] [2022-02-15 02:00:35,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:35,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:35,174 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:35,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:35,175 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:35,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:35,533 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:35,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505533163] [2022-02-15 02:00:35,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1505533163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:35,533 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:35,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:35,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612158929] [2022-02-15 02:00:35,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:35,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:35,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:35,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:35,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:35,534 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:36,918 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-02-15 02:00:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:36,918 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:36,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:36,919 INFO L225 Difference]: With dead ends: 350 [2022-02-15 02:00:36,919 INFO L226 Difference]: Without dead ends: 344 [2022-02-15 02:00:36,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:36,919 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:36,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-15 02:00:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 239. [2022-02-15 02:00:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-02-15 02:00:37,367 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 70 [2022-02-15 02:00:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:37,367 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-02-15 02:00:37,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-02-15 02:00:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:37,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:37,367 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:37,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434 [2022-02-15 02:00:37,368 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1407756146, now seen corresponding path program 433 times [2022-02-15 02:00:37,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:37,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014814061] [2022-02-15 02:00:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:37,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:37,369 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:37,369 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:37,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:37,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:37,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014814061] [2022-02-15 02:00:37,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014814061] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:37,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:37,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:37,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453139535] [2022-02-15 02:00:37,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:37,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:37,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:37,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:37,734 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:39,139 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-02-15 02:00:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:39,140 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:39,140 INFO L225 Difference]: With dead ends: 356 [2022-02-15 02:00:39,140 INFO L226 Difference]: Without dead ends: 350 [2022-02-15 02:00:39,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:39,141 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:39,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 23 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-15 02:00:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 241. [2022-02-15 02:00:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-02-15 02:00:39,601 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 70 [2022-02-15 02:00:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:39,601 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-02-15 02:00:39,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-02-15 02:00:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:00:39,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:39,601 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:39,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435 [2022-02-15 02:00:39,601 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash -971215118, now seen corresponding path program 434 times [2022-02-15 02:00:39,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:39,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066913608] [2022-02-15 02:00:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:39,603 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:39,603 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:39,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:39,603 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:39,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:39,979 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:39,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066913608] [2022-02-15 02:00:39,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2066913608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:39,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:39,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:00:39,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711702929] [2022-02-15 02:00:39,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:39,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:00:39,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:39,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:00:39,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:00:39,980 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:41,266 INFO L93 Difference]: Finished difference Result 304 states and 446 transitions. [2022-02-15 02:00:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:00:41,266 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have 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 [2022-02-15 02:00:41,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:41,266 INFO L225 Difference]: With dead ends: 304 [2022-02-15 02:00:41,266 INFO L226 Difference]: Without dead ends: 298 [2022-02-15 02:00:41,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1555, Invalid=2605, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:00:41,267 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:41,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 22 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:41,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-15 02:00:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 187. [2022-02-15 02:00:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 274 transitions. [2022-02-15 02:00:41,568 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 274 transitions. Word has length 70 [2022-02-15 02:00:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:41,568 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 274 transitions. [2022-02-15 02:00:41,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 274 transitions. [2022-02-15 02:00:41,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:41,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:41,568 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:41,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436 [2022-02-15 02:00:41,568 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1519752747, now seen corresponding path program 435 times [2022-02-15 02:00:41,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:41,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384220449] [2022-02-15 02:00:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:41,569 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:41,569 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:41,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:41,570 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:41,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:41,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:41,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384220449] [2022-02-15 02:00:41,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [384220449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:41,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:41,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:00:41,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987984118] [2022-02-15 02:00:41,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:41,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:00:41,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:41,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:00:41,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:00:41,951 INFO L87 Difference]: Start difference. First operand 187 states and 274 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:42,985 INFO L93 Difference]: Finished difference Result 202 states and 294 transitions. [2022-02-15 02:00:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:00:42,985 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:00:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:42,986 INFO L225 Difference]: With dead ends: 202 [2022-02-15 02:00:42,986 INFO L226 Difference]: Without dead ends: 196 [2022-02-15 02:00:42,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:42,986 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:42,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 19 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:42,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-15 02:00:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2022-02-15 02:00:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.4838709677419355) internal successors, (276), 186 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-02-15 02:00:43,293 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 72 [2022-02-15 02:00:43,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:43,294 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-02-15 02:00:43,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:43,294 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-02-15 02:00:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:43,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:43,294 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:43,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437 [2022-02-15 02:00:43,294 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:43,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1680265557, now seen corresponding path program 436 times [2022-02-15 02:00:43,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:43,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092499136] [2022-02-15 02:00:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:43,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:43,295 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:43,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:43,296 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:43,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:43,673 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:43,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092499136] [2022-02-15 02:00:43,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1092499136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:43,674 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:43,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:00:43,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252749188] [2022-02-15 02:00:43,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:43,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:00:43,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:00:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:00:43,674 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:44,719 INFO L93 Difference]: Finished difference Result 206 states and 299 transitions. [2022-02-15 02:00:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:00:44,719 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:00:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:44,720 INFO L225 Difference]: With dead ends: 206 [2022-02-15 02:00:44,720 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 02:00:44,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:44,720 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:44,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 02:00:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2022-02-15 02:00:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.4842105263157894) internal successors, (282), 190 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 286 transitions. [2022-02-15 02:00:45,046 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 286 transitions. Word has length 72 [2022-02-15 02:00:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:45,046 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 286 transitions. [2022-02-15 02:00:45,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 286 transitions. [2022-02-15 02:00:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:45,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:45,047 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:45,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438 [2022-02-15 02:00:45,047 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:45,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:45,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1701271765, now seen corresponding path program 437 times [2022-02-15 02:00:45,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:45,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704294373] [2022-02-15 02:00:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:45,048 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:45,048 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:45,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:45,049 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:45,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:45,424 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:45,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704294373] [2022-02-15 02:00:45,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1704294373] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:45,424 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:45,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:00:45,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91271302] [2022-02-15 02:00:45,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:45,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:00:45,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:00:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:00:45,425 INFO L87 Difference]: Start difference. First operand 195 states and 286 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:46,480 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 02:00:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:00:46,480 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:00:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:46,481 INFO L225 Difference]: With dead ends: 212 [2022-02-15 02:00:46,481 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 02:00:46,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:46,481 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:46,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 02:00:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 197. [2022-02-15 02:00:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-15 02:00:46,808 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 72 [2022-02-15 02:00:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:46,808 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-15 02:00:46,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-15 02:00:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:46,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:46,808 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:46,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439 [2022-02-15 02:00:46,809 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash 413401173, now seen corresponding path program 438 times [2022-02-15 02:00:46,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:46,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525269080] [2022-02-15 02:00:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:46,810 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:46,810 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:46,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:46,810 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:47,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:47,180 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:47,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525269080] [2022-02-15 02:00:47,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [525269080] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:47,180 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:47,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:00:47,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814444429] [2022-02-15 02:00:47,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:47,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:00:47,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:47,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:00:47,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:00:47,181 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:48,246 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 02:00:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:00:48,246 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:00:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:48,246 INFO L225 Difference]: With dead ends: 218 [2022-02-15 02:00:48,246 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 02:00:48,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:48,247 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:48,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 02:00:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 199. [2022-02-15 02:00:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-15 02:00:48,575 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 72 [2022-02-15 02:00:48,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:48,575 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-15 02:00:48,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-15 02:00:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:48,576 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:48,576 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:48,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440 [2022-02-15 02:00:48,576 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash -279656491, now seen corresponding path program 439 times [2022-02-15 02:00:48,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:48,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157436534] [2022-02-15 02:00:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:48,577 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:48,577 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:48,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:48,577 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:48,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:48,949 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:48,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157436534] [2022-02-15 02:00:48,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1157436534] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:48,949 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:48,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:00:48,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673455773] [2022-02-15 02:00:48,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:48,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:00:48,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:00:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:00:48,950 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:50,047 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 02:00:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:00:50,047 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:00:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:50,047 INFO L225 Difference]: With dead ends: 224 [2022-02-15 02:00:50,047 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 02:00:50,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:50,048 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:50,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 27 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 02:00:50,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 201. [2022-02-15 02:00:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-15 02:00:50,383 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 72 [2022-02-15 02:00:50,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:50,384 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-15 02:00:50,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:50,384 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-15 02:00:50,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:50,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:50,384 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:50,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441 [2022-02-15 02:00:50,384 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:50,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:50,384 INFO L85 PathProgramCache]: Analyzing trace with hash -588140715, now seen corresponding path program 440 times [2022-02-15 02:00:50,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:50,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829550558] [2022-02-15 02:00:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:50,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:50,385 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:50,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:50,387 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:50,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:50,759 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:50,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829550558] [2022-02-15 02:00:50,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829550558] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:50,759 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:50,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:00:50,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453897187] [2022-02-15 02:00:50,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:50,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:00:50,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:00:50,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:00:50,760 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:51,868 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 02:00:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:00:51,869 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:00:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:51,869 INFO L225 Difference]: With dead ends: 230 [2022-02-15 02:00:51,869 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 02:00:51,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:51,870 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:51,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 02:00:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 203. [2022-02-15 02:00:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-15 02:00:52,219 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 72 [2022-02-15 02:00:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:52,220 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-15 02:00:52,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-15 02:00:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:52,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:52,220 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:52,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442 [2022-02-15 02:00:52,220 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash -688736555, now seen corresponding path program 441 times [2022-02-15 02:00:52,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:52,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629521909] [2022-02-15 02:00:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:52,221 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:52,221 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:52,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:52,222 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:52,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:52,605 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:52,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629521909] [2022-02-15 02:00:52,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1629521909] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:52,605 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:52,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:00:52,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831137906] [2022-02-15 02:00:52,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:52,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:00:52,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:52,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:00:52,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:00:52,606 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:53,732 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 02:00:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:00:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:00:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:53,733 INFO L225 Difference]: With dead ends: 236 [2022-02-15 02:00:53,733 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 02:00:53,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:53,733 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:53,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 02:00:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 205. [2022-02-15 02:00:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-15 02:00:54,089 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 72 [2022-02-15 02:00:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:54,089 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-15 02:00:54,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-15 02:00:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:54,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:54,089 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:54,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443 [2022-02-15 02:00:54,090 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1422909013, now seen corresponding path program 442 times [2022-02-15 02:00:54,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:54,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041753141] [2022-02-15 02:00:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:54,091 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:54,091 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:54,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:54,091 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:54,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:54,464 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:54,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041753141] [2022-02-15 02:00:54,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1041753141] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:54,464 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:54,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:00:54,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014084392] [2022-02-15 02:00:54,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:54,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:00:54,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:54,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:00:54,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:00:54,465 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:55,629 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 02:00:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:00:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:00:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:55,629 INFO L225 Difference]: With dead ends: 242 [2022-02-15 02:00:55,629 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 02:00:55,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:55,630 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:55,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 02:00:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 207. [2022-02-15 02:00:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-15 02:00:55,994 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 72 [2022-02-15 02:00:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:55,994 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-15 02:00:55,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-15 02:00:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:55,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:55,995 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:55,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable444 [2022-02-15 02:00:55,995 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:55,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:55,995 INFO L85 PathProgramCache]: Analyzing trace with hash -805231147, now seen corresponding path program 443 times [2022-02-15 02:00:55,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:55,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989058288] [2022-02-15 02:00:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:55,996 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:55,996 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:55,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:55,997 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:56,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:56,375 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:56,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989058288] [2022-02-15 02:00:56,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1989058288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:56,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:56,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:00:56,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984007168] [2022-02-15 02:00:56,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:56,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:00:56,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:56,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:00:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:00:56,378 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:57,549 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 02:00:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:00:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:00:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:57,550 INFO L225 Difference]: With dead ends: 248 [2022-02-15 02:00:57,550 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 02:00:57,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:57,550 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:57,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 02:00:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 209. [2022-02-15 02:00:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-15 02:00:57,921 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 72 [2022-02-15 02:00:57,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:57,921 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-15 02:00:57,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-15 02:00:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:57,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:57,921 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:57,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445 [2022-02-15 02:00:57,921 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1140755797, now seen corresponding path program 444 times [2022-02-15 02:00:57,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:57,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704070979] [2022-02-15 02:00:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:57,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:57,923 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:57,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:57,923 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:58,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:58,300 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:58,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704070979] [2022-02-15 02:00:58,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1704070979] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:58,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:58,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:00:58,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553101957] [2022-02-15 02:00:58,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:58,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:00:58,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:58,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:00:58,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:00:58,301 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:59,492 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 02:00:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:00:59,493 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:00:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:59,493 INFO L225 Difference]: With dead ends: 254 [2022-02-15 02:00:59,493 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 02:00:59,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:59,494 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:59,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 02:00:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 211. [2022-02-15 02:00:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-15 02:00:59,870 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 72 [2022-02-15 02:00:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:59,870 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-15 02:00:59,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-15 02:00:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:00:59,870 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:59,870 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:59,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446 [2022-02-15 02:00:59,870 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:59,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:59,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1371532075, now seen corresponding path program 445 times [2022-02-15 02:00:59,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:59,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103270566] [2022-02-15 02:00:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:59,871 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:00:59,871 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:00:59,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:59,872 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:00,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:00,248 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:00,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103270566] [2022-02-15 02:01:00,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2103270566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:00,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:00,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:00,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601747383] [2022-02-15 02:01:00,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:00,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:00,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:00,250 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:01,464 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 02:01:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:01,464 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:01,464 INFO L225 Difference]: With dead ends: 260 [2022-02-15 02:01:01,464 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 02:01:01,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:01,465 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:01,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 02:01:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 213. [2022-02-15 02:01:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-15 02:01:01,852 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 72 [2022-02-15 02:01:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:01,852 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-15 02:01:01,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-15 02:01:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:01,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:01,853 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:01,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447 [2022-02-15 02:01:01,853 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:01,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:01,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1908556715, now seen corresponding path program 446 times [2022-02-15 02:01:01,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:01,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116262544] [2022-02-15 02:01:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:01,854 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:01,854 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:01,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:01,855 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:02,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:02,230 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:02,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116262544] [2022-02-15 02:01:02,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116262544] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:02,230 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:02,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:02,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743530065] [2022-02-15 02:01:02,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:02,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:02,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:02,231 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:03,459 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 02:01:03,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:03,459 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:03,459 INFO L225 Difference]: With dead ends: 266 [2022-02-15 02:01:03,459 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 02:01:03,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:03,460 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:03,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 02:01:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 215. [2022-02-15 02:01:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-15 02:01:03,850 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 72 [2022-02-15 02:01:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:03,850 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-15 02:01:03,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-15 02:01:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:03,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:03,850 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:03,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448 [2022-02-15 02:01:03,851 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:03,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1701807061, now seen corresponding path program 447 times [2022-02-15 02:01:03,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:03,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184168248] [2022-02-15 02:01:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:03,852 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:03,852 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:03,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:03,852 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:04,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:04,235 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:04,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184168248] [2022-02-15 02:01:04,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [184168248] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:04,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:04,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:04,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080832978] [2022-02-15 02:01:04,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:04,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:04,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:04,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:04,236 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:05,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:05,477 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 02:01:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:05,478 INFO L225 Difference]: With dead ends: 272 [2022-02-15 02:01:05,478 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 02:01:05,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:05,479 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:05,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 02:01:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 217. [2022-02-15 02:01:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-15 02:01:05,880 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 72 [2022-02-15 02:01:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:05,880 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-15 02:01:05,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-15 02:01:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:05,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:05,881 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:05,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449 [2022-02-15 02:01:05,881 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:05,881 INFO L85 PathProgramCache]: Analyzing trace with hash 927820629, now seen corresponding path program 448 times [2022-02-15 02:01:05,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:05,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020300406] [2022-02-15 02:01:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:05,882 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:05,882 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:05,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:05,882 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:06,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:06,310 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:06,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020300406] [2022-02-15 02:01:06,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020300406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:06,310 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:06,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:06,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267490447] [2022-02-15 02:01:06,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:06,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:06,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:06,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:06,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:06,311 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:07,577 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 02:01:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:07,578 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:07,578 INFO L225 Difference]: With dead ends: 278 [2022-02-15 02:01:07,578 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 02:01:07,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:07,579 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:07,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 02:01:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 219. [2022-02-15 02:01:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-15 02:01:07,986 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 72 [2022-02-15 02:01:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:07,986 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-15 02:01:07,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-15 02:01:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:07,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:07,986 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:07,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450 [2022-02-15 02:01:07,986 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:07,987 INFO L85 PathProgramCache]: Analyzing trace with hash 156201685, now seen corresponding path program 449 times [2022-02-15 02:01:07,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:07,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931229749] [2022-02-15 02:01:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:07,987 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:07,987 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:07,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:07,988 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:08,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:08,364 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:08,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931229749] [2022-02-15 02:01:08,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [931229749] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:08,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:08,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:08,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584446458] [2022-02-15 02:01:08,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:08,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:08,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:08,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:08,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:08,365 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:09,654 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 02:01:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:09,654 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:09,655 INFO L225 Difference]: With dead ends: 284 [2022-02-15 02:01:09,655 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 02:01:09,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:09,655 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:09,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:09,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 02:01:10,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 221. [2022-02-15 02:01:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-15 02:01:10,072 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 72 [2022-02-15 02:01:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:10,072 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-15 02:01:10,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-15 02:01:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:10,073 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:10,073 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:10,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451 [2022-02-15 02:01:10,073 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:10,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1659738709, now seen corresponding path program 450 times [2022-02-15 02:01:10,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:10,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259180982] [2022-02-15 02:01:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:10,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:10,074 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:10,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:10,075 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:10,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:10,455 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:10,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259180982] [2022-02-15 02:01:10,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259180982] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:10,456 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:10,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:10,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925880323] [2022-02-15 02:01:10,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:10,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:10,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:10,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:10,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:10,456 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:11,783 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-15 02:01:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:11,784 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:11,784 INFO L225 Difference]: With dead ends: 290 [2022-02-15 02:01:11,784 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 02:01:11,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:11,784 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:11,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 02:01:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 223. [2022-02-15 02:01:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-15 02:01:12,218 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 72 [2022-02-15 02:01:12,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:12,218 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-15 02:01:12,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-15 02:01:12,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:12,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:12,218 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:12,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452 [2022-02-15 02:01:12,219 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:12,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:12,219 INFO L85 PathProgramCache]: Analyzing trace with hash -845159979, now seen corresponding path program 451 times [2022-02-15 02:01:12,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:12,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076389795] [2022-02-15 02:01:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:12,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:12,220 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:12,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:12,220 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:12,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:12,619 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:12,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076389795] [2022-02-15 02:01:12,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076389795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:12,619 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:12,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:12,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818001447] [2022-02-15 02:01:12,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:12,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:12,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:12,620 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:14,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:14,000 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-15 02:01:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:14,001 INFO L225 Difference]: With dead ends: 296 [2022-02-15 02:01:14,001 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 02:01:14,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:14,001 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:14,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:01:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 02:01:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 225. [2022-02-15 02:01:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-15 02:01:14,437 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 72 [2022-02-15 02:01:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:14,437 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-15 02:01:14,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-15 02:01:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:14,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:14,437 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:14,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453 [2022-02-15 02:01:14,438 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:14,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:14,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1423853909, now seen corresponding path program 452 times [2022-02-15 02:01:14,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:14,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470063062] [2022-02-15 02:01:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:14,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:14,439 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:14,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:14,439 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:14,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:14,821 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:14,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470063062] [2022-02-15 02:01:14,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [470063062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:14,821 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:14,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:14,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811275227] [2022-02-15 02:01:14,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:14,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:14,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:14,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:14,822 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:16,214 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-15 02:01:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:16,214 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:16,215 INFO L225 Difference]: With dead ends: 302 [2022-02-15 02:01:16,215 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 02:01:16,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:16,215 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:16,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 02:01:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 227. [2022-02-15 02:01:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:16,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-15 02:01:16,663 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 72 [2022-02-15 02:01:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:16,663 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-15 02:01:16,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-15 02:01:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:16,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:16,664 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:16,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454 [2022-02-15 02:01:16,664 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash 102813909, now seen corresponding path program 453 times [2022-02-15 02:01:16,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:16,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236884916] [2022-02-15 02:01:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:16,665 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:16,665 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:16,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:16,665 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:17,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:17,051 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:17,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236884916] [2022-02-15 02:01:17,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [236884916] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:17,051 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:17,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:17,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966960553] [2022-02-15 02:01:17,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:17,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:17,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:17,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:17,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:17,052 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:18,466 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-15 02:01:18,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:18,466 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:18,467 INFO L225 Difference]: With dead ends: 308 [2022-02-15 02:01:18,467 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 02:01:18,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:18,467 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:18,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:01:18,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 02:01:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 229. [2022-02-15 02:01:18,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-15 02:01:18,911 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 72 [2022-02-15 02:01:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:18,911 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-15 02:01:18,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-15 02:01:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:18,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:18,912 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:18,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable455 [2022-02-15 02:01:18,912 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:18,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1893693525, now seen corresponding path program 454 times [2022-02-15 02:01:18,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:18,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102321251] [2022-02-15 02:01:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:18,913 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:18,913 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:18,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:18,913 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:19,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:19,295 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:19,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102321251] [2022-02-15 02:01:19,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102321251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:19,295 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:19,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:19,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583758053] [2022-02-15 02:01:19,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:19,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:19,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:19,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:19,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:19,296 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:20,709 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-15 02:01:20,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:20,709 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:20,710 INFO L225 Difference]: With dead ends: 314 [2022-02-15 02:01:20,710 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 02:01:20,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:20,710 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:20,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 27 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 02:01:21,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 231. [2022-02-15 02:01:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-15 02:01:21,173 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 72 [2022-02-15 02:01:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:21,174 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-15 02:01:21,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-15 02:01:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:21,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:21,174 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:21,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456 [2022-02-15 02:01:21,174 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:21,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash 647118805, now seen corresponding path program 455 times [2022-02-15 02:01:21,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:21,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367384042] [2022-02-15 02:01:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:21,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:21,175 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:21,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:21,176 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:21,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:21,564 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:21,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367384042] [2022-02-15 02:01:21,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [367384042] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:21,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:21,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:21,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28714263] [2022-02-15 02:01:21,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:21,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:21,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:21,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:21,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:21,565 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:23,010 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-15 02:01:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:23,010 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:23,011 INFO L225 Difference]: With dead ends: 320 [2022-02-15 02:01:23,011 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 02:01:23,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:23,011 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:23,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 02:01:23,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 233. [2022-02-15 02:01:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-15 02:01:23,471 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 72 [2022-02-15 02:01:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:23,471 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-15 02:01:23,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-15 02:01:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:23,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:23,472 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:23,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457 [2022-02-15 02:01:23,472 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash 984688469, now seen corresponding path program 456 times [2022-02-15 02:01:23,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:23,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766460717] [2022-02-15 02:01:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:23,473 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:23,473 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:23,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:23,474 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:23,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:23,855 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:23,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766460717] [2022-02-15 02:01:23,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [766460717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:23,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:23,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:23,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992366094] [2022-02-15 02:01:23,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:23,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:23,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:23,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:23,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:23,856 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:25,283 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-15 02:01:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:25,284 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:25,284 INFO L225 Difference]: With dead ends: 326 [2022-02-15 02:01:25,284 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 02:01:25,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:25,284 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:25,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 02:01:25,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 235. [2022-02-15 02:01:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-02-15 02:01:25,742 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 72 [2022-02-15 02:01:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:25,742 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-02-15 02:01:25,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-02-15 02:01:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:25,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:25,743 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:25,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458 [2022-02-15 02:01:25,743 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:25,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1028378923, now seen corresponding path program 457 times [2022-02-15 02:01:25,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:25,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449260464] [2022-02-15 02:01:25,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:25,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:25,744 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:25,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:25,745 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:26,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:26,123 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:26,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449260464] [2022-02-15 02:01:26,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449260464] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:26,124 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:26,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:26,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058270045] [2022-02-15 02:01:26,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:26,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:26,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:26,125 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:27,547 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-15 02:01:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:27,547 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:27,548 INFO L225 Difference]: With dead ends: 332 [2022-02-15 02:01:27,548 INFO L226 Difference]: Without dead ends: 326 [2022-02-15 02:01:27,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:27,548 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:27,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-15 02:01:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 237. [2022-02-15 02:01:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-02-15 02:01:28,012 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 72 [2022-02-15 02:01:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:28,012 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-02-15 02:01:28,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-02-15 02:01:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:28,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:28,012 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:28,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459 [2022-02-15 02:01:28,012 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:28,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1444107861, now seen corresponding path program 458 times [2022-02-15 02:01:28,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:28,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872163525] [2022-02-15 02:01:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:28,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:28,014 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:28,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:28,014 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:28,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:28,396 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:28,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872163525] [2022-02-15 02:01:28,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872163525] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:28,396 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:28,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:28,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841410311] [2022-02-15 02:01:28,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:28,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:28,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:28,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:28,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:28,397 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:29,839 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-15 02:01:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:29,840 INFO L225 Difference]: With dead ends: 338 [2022-02-15 02:01:29,840 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 02:01:29,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:29,840 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:29,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 02:01:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 239. [2022-02-15 02:01:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-02-15 02:01:30,303 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 72 [2022-02-15 02:01:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:30,304 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-02-15 02:01:30,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-02-15 02:01:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:30,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:30,304 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:30,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460 [2022-02-15 02:01:30,304 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1907974699, now seen corresponding path program 459 times [2022-02-15 02:01:30,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:30,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988842279] [2022-02-15 02:01:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:30,305 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:30,306 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:30,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:30,306 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:30,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:30,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:30,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988842279] [2022-02-15 02:01:30,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988842279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:30,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:30,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:30,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425919899] [2022-02-15 02:01:30,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:30,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:30,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:30,700 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:32,163 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-15 02:01:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:32,163 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:32,164 INFO L225 Difference]: With dead ends: 344 [2022-02-15 02:01:32,164 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 02:01:32,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:32,164 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:32,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 02:01:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 241. [2022-02-15 02:01:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-02-15 02:01:32,635 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 72 [2022-02-15 02:01:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:32,636 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-02-15 02:01:32,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-02-15 02:01:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:32,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:32,636 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:32,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461 [2022-02-15 02:01:32,636 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:32,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2033842859, now seen corresponding path program 460 times [2022-02-15 02:01:32,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:32,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312093200] [2022-02-15 02:01:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:32,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:32,637 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:32,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:32,638 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:33,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:33,021 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:33,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312093200] [2022-02-15 02:01:33,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1312093200] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:33,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:33,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:33,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245466228] [2022-02-15 02:01:33,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:33,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:33,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:33,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:33,022 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:34,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:34,481 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-02-15 02:01:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:34,481 INFO L225 Difference]: With dead ends: 350 [2022-02-15 02:01:34,481 INFO L226 Difference]: Without dead ends: 344 [2022-02-15 02:01:34,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:34,482 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:34,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 21 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-15 02:01:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 243. [2022-02-15 02:01:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-02-15 02:01:34,962 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 72 [2022-02-15 02:01:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:34,962 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-02-15 02:01:34,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-02-15 02:01:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:34,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:34,963 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:34,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462 [2022-02-15 02:01:34,963 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:34,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1560906965, now seen corresponding path program 461 times [2022-02-15 02:01:34,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:34,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991186126] [2022-02-15 02:01:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:34,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:34,964 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:34,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:34,965 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:35,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:35,342 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:35,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991186126] [2022-02-15 02:01:35,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [991186126] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:35,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:35,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:35,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228893640] [2022-02-15 02:01:35,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:35,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:35,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:35,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:35,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:35,343 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:36,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:36,834 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-02-15 02:01:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:36,834 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:36,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:36,834 INFO L225 Difference]: With dead ends: 356 [2022-02-15 02:01:36,834 INFO L226 Difference]: Without dead ends: 350 [2022-02-15 02:01:36,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:36,835 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:36,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-15 02:01:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 245. [2022-02-15 02:01:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-02-15 02:01:37,315 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 72 [2022-02-15 02:01:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:37,315 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-02-15 02:01:37,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-02-15 02:01:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:37,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:37,315 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:37,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463 [2022-02-15 02:01:37,315 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:37,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:37,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1333185451, now seen corresponding path program 462 times [2022-02-15 02:01:37,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:37,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403359385] [2022-02-15 02:01:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:37,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:37,317 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:37,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:37,318 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:37,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:37,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:37,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403359385] [2022-02-15 02:01:37,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403359385] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:37,699 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:37,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:37,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547959353] [2022-02-15 02:01:37,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:37,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:37,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:37,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:37,700 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:39,177 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-02-15 02:01:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:39,177 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:39,178 INFO L225 Difference]: With dead ends: 362 [2022-02-15 02:01:39,178 INFO L226 Difference]: Without dead ends: 356 [2022-02-15 02:01:39,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:39,178 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:39,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 29 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:39,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-15 02:01:39,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 247. [2022-02-15 02:01:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-02-15 02:01:39,663 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 72 [2022-02-15 02:01:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:39,663 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-02-15 02:01:39,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:39,664 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-02-15 02:01:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:39,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:39,664 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:39,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464 [2022-02-15 02:01:39,664 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash 582810581, now seen corresponding path program 463 times [2022-02-15 02:01:39,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:39,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994367961] [2022-02-15 02:01:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:39,665 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:39,665 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:39,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:39,666 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:40,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:40,047 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:40,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994367961] [2022-02-15 02:01:40,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994367961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:40,048 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:40,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:40,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066566094] [2022-02-15 02:01:40,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:40,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:40,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:40,049 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:41,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:41,553 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-02-15 02:01:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:41,553 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:41,554 INFO L225 Difference]: With dead ends: 368 [2022-02-15 02:01:41,554 INFO L226 Difference]: Without dead ends: 362 [2022-02-15 02:01:41,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:41,554 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:41,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-15 02:01:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2022-02-15 02:01:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-02-15 02:01:42,047 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 72 [2022-02-15 02:01:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:42,048 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-02-15 02:01:42,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-02-15 02:01:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:01:42,048 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:42,048 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:42,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465 [2022-02-15 02:01:42,048 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:42,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:42,048 INFO L85 PathProgramCache]: Analyzing trace with hash -685972651, now seen corresponding path program 464 times [2022-02-15 02:01:42,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:42,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425995958] [2022-02-15 02:01:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:42,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:42,049 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:42,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:42,050 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:42,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:42,435 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:42,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425995958] [2022-02-15 02:01:42,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425995958] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:42,435 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:42,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:01:42,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126519643] [2022-02-15 02:01:42,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:42,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:01:42,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:01:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:42,436 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:43,803 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-15 02:01:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:43,803 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 02:01:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:43,804 INFO L225 Difference]: With dead ends: 314 [2022-02-15 02:01:43,804 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 02:01:43,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1653, Invalid=2769, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:43,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:43,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 02:01:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 193. [2022-02-15 02:01:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.4840425531914894) internal successors, (279), 188 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 283 transitions. [2022-02-15 02:01:44,136 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 283 transitions. Word has length 72 [2022-02-15 02:01:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:44,136 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 283 transitions. [2022-02-15 02:01:44,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 283 transitions. [2022-02-15 02:01:44,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:01:44,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:44,137 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:44,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable466 [2022-02-15 02:01:44,137 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:44,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1545292280, now seen corresponding path program 465 times [2022-02-15 02:01:44,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:44,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045454158] [2022-02-15 02:01:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:44,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:44,138 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:44,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:44,139 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:44,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:44,547 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:44,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045454158] [2022-02-15 02:01:44,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1045454158] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:44,547 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:44,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:01:44,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573502807] [2022-02-15 02:01:44,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:44,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:01:44,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:44,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:01:44,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:01:44,548 INFO L87 Difference]: Start difference. First operand 193 states and 283 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:45,663 INFO L93 Difference]: Finished difference Result 208 states and 303 transitions. [2022-02-15 02:01:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:01:45,664 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:01:45,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:45,664 INFO L225 Difference]: With dead ends: 208 [2022-02-15 02:01:45,664 INFO L226 Difference]: Without dead ends: 202 [2022-02-15 02:01:45,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:01:45,665 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:45,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 21 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-02-15 02:01:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2022-02-15 02:01:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.484375) internal successors, (285), 192 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-02-15 02:01:45,998 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 74 [2022-02-15 02:01:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:45,998 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-02-15 02:01:45,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-02-15 02:01:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:01:45,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:45,998 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:45,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467 [2022-02-15 02:01:45,999 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:45,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:45,999 INFO L85 PathProgramCache]: Analyzing trace with hash 450343288, now seen corresponding path program 466 times [2022-02-15 02:01:45,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:45,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503172721] [2022-02-15 02:01:45,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:46,000 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:46,000 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:46,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:46,000 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:46,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:46,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:46,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503172721] [2022-02-15 02:01:46,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503172721] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:46,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:46,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:01:46,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223348669] [2022-02-15 02:01:46,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:46,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:01:46,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:01:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:01:46,401 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:47,512 INFO L93 Difference]: Finished difference Result 212 states and 308 transitions. [2022-02-15 02:01:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:01:47,512 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:01:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:47,513 INFO L225 Difference]: With dead ends: 212 [2022-02-15 02:01:47,513 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 02:01:47,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:01:47,513 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:47,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 02:01:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 201. [2022-02-15 02:01:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.4846938775510203) internal successors, (291), 196 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-02-15 02:01:47,867 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 74 [2022-02-15 02:01:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:47,867 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-02-15 02:01:47,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-02-15 02:01:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:01:47,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:47,868 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:47,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468 [2022-02-15 02:01:47,868 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash 471349496, now seen corresponding path program 467 times [2022-02-15 02:01:47,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:47,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504839066] [2022-02-15 02:01:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:47,869 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:47,869 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:47,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:47,870 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:48,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:48,270 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:48,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504839066] [2022-02-15 02:01:48,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [504839066] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:48,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:48,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:01:48,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005908200] [2022-02-15 02:01:48,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:48,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:01:48,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:48,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:01:48,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:01:48,271 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:49,414 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 02:01:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:01:49,415 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:01:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:49,415 INFO L225 Difference]: With dead ends: 218 [2022-02-15 02:01:49,415 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 02:01:49,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:01:49,416 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:49,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 02:01:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 203. [2022-02-15 02:01:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-15 02:01:49,772 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 74 [2022-02-15 02:01:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:49,772 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-15 02:01:49,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-15 02:01:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:01:49,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:49,773 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:49,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469 [2022-02-15 02:01:49,773 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash -816521096, now seen corresponding path program 468 times [2022-02-15 02:01:49,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:49,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209485374] [2022-02-15 02:01:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:49,774 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:49,774 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:49,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:49,774 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:50,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:50,213 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:50,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209485374] [2022-02-15 02:01:50,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [209485374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:50,214 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:50,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:01:50,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082762967] [2022-02-15 02:01:50,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:50,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:01:50,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:01:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:01:50,214 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:51,380 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 02:01:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:01:51,381 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:01:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:51,381 INFO L225 Difference]: With dead ends: 224 [2022-02-15 02:01:51,381 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 02:01:51,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:01:51,382 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:51,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:51,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 02:01:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 205. [2022-02-15 02:01:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-15 02:01:51,752 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 74 [2022-02-15 02:01:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:51,752 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-15 02:01:51,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-15 02:01:51,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:01:51,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:51,752 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:51,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470 [2022-02-15 02:01:51,752 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:51,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1509578760, now seen corresponding path program 469 times [2022-02-15 02:01:51,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:51,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191079115] [2022-02-15 02:01:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:51,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:51,753 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:51,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:51,754 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:52,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:52,151 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:52,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191079115] [2022-02-15 02:01:52,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191079115] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:52,151 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:52,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:01:52,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55063264] [2022-02-15 02:01:52,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:52,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:01:52,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:52,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:01:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:01:52,152 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:53,314 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 02:01:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:01:53,314 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:01:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:53,315 INFO L225 Difference]: With dead ends: 230 [2022-02-15 02:01:53,315 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 02:01:53,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:01:53,315 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:53,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 02:01:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 207. [2022-02-15 02:01:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-15 02:01:53,687 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 74 [2022-02-15 02:01:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:53,687 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-15 02:01:53,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-15 02:01:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:01:53,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:53,687 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:53,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471 [2022-02-15 02:01:53,688 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:53,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1818062984, now seen corresponding path program 470 times [2022-02-15 02:01:53,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:53,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776591003] [2022-02-15 02:01:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:53,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:53,689 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:53,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:53,689 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:54,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:54,088 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:54,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776591003] [2022-02-15 02:01:54,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [776591003] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:54,089 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:54,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:01:54,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693917488] [2022-02-15 02:01:54,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:54,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:01:54,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:54,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:01:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:01:54,090 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:55,267 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 02:01:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:01:55,268 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:01:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:55,268 INFO L225 Difference]: With dead ends: 236 [2022-02-15 02:01:55,268 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 02:01:55,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:01:55,268 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:55,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 02:01:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 209. [2022-02-15 02:01:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-15 02:01:55,643 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 74 [2022-02-15 02:01:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:55,643 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-15 02:01:55,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:55,643 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-15 02:01:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:01:55,643 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:55,643 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:55,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472 [2022-02-15 02:01:55,643 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:55,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:55,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1918658824, now seen corresponding path program 471 times [2022-02-15 02:01:55,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:55,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342467535] [2022-02-15 02:01:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:55,646 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:55,646 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:55,647 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:56,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:56,060 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:56,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342467535] [2022-02-15 02:01:56,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [342467535] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:56,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:56,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:01:56,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347715300] [2022-02-15 02:01:56,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:56,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:01:56,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:56,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:01:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:01:56,061 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:57,268 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 02:01:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:01:57,268 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:01:57,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:57,268 INFO L225 Difference]: With dead ends: 242 [2022-02-15 02:01:57,268 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 02:01:57,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:01:57,269 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:57,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:01:57,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 02:01:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 211. [2022-02-15 02:01:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-15 02:01:57,656 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 74 [2022-02-15 02:01:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:57,656 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-15 02:01:57,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-15 02:01:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:01:57,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:57,656 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:57,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473 [2022-02-15 02:01:57,656 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash 192986744, now seen corresponding path program 472 times [2022-02-15 02:01:57,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:57,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811864165] [2022-02-15 02:01:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:57,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:57,658 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:57,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:57,658 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:58,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:58,057 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:58,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811864165] [2022-02-15 02:01:58,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [811864165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:58,057 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:58,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:01:58,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515240548] [2022-02-15 02:01:58,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:58,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:01:58,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:01:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:01:58,058 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:59,292 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 02:01:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:01:59,292 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:01:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:59,293 INFO L225 Difference]: With dead ends: 248 [2022-02-15 02:01:59,293 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 02:01:59,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:01:59,293 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:59,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 02:01:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 213. [2022-02-15 02:01:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-15 02:01:59,689 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 74 [2022-02-15 02:01:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:59,689 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-15 02:01:59,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-15 02:01:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:01:59,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:59,690 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:59,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474 [2022-02-15 02:01:59,690 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2035153416, now seen corresponding path program 473 times [2022-02-15 02:01:59,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:59,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899662140] [2022-02-15 02:01:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:59,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:01:59,691 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:01:59,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:59,691 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:01:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:00,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:00,093 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:00,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899662140] [2022-02-15 02:02:00,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [899662140] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:00,093 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:00,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:00,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469106396] [2022-02-15 02:02:00,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:00,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:00,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:00,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:00,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:00,094 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:01,336 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 02:02:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:01,337 INFO L225 Difference]: With dead ends: 254 [2022-02-15 02:02:01,337 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 02:02:01,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:01,338 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:01,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 25 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 02:02:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 215. [2022-02-15 02:02:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-15 02:02:01,741 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 74 [2022-02-15 02:02:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:01,741 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-15 02:02:01,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-15 02:02:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:01,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:01,742 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:01,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475 [2022-02-15 02:02:01,742 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash -89166472, now seen corresponding path program 474 times [2022-02-15 02:02:01,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:01,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285999910] [2022-02-15 02:02:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:01,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:01,743 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:01,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:01,744 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:02,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:02,149 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:02,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285999910] [2022-02-15 02:02:02,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [285999910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:02,149 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:02,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:02,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213873795] [2022-02-15 02:02:02,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:02,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:02,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:02,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:02,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:02,150 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:03,419 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 02:02:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:03,419 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:03,419 INFO L225 Difference]: With dead ends: 260 [2022-02-15 02:02:03,419 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 02:02:03,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:03,420 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:03,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 02:02:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2022-02-15 02:02:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-15 02:02:03,828 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 74 [2022-02-15 02:02:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:03,829 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-15 02:02:03,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-15 02:02:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:03,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:03,829 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:03,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable476 [2022-02-15 02:02:03,829 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:03,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:03,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1693512952, now seen corresponding path program 475 times [2022-02-15 02:02:03,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:03,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604152459] [2022-02-15 02:02:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:03,830 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:03,830 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:03,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:03,831 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:04,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:04,223 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:04,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604152459] [2022-02-15 02:02:04,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1604152459] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:04,223 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:04,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:04,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294646851] [2022-02-15 02:02:04,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:04,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:04,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:04,224 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:05,503 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 02:02:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:05,503 INFO L225 Difference]: With dead ends: 266 [2022-02-15 02:02:05,503 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 02:02:05,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:05,504 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:05,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 25 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 02:02:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 219. [2022-02-15 02:02:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-15 02:02:05,919 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 74 [2022-02-15 02:02:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:05,919 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-15 02:02:05,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-15 02:02:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:05,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:05,919 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:05,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477 [2022-02-15 02:02:05,920 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1156488312, now seen corresponding path program 476 times [2022-02-15 02:02:05,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:05,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451773991] [2022-02-15 02:02:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:05,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:05,921 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:05,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:05,921 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:06,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:06,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:06,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451773991] [2022-02-15 02:02:06,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [451773991] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:06,320 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:06,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:06,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222313750] [2022-02-15 02:02:06,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:06,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:06,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:06,321 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:07,636 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 02:02:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:07,636 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:07,637 INFO L225 Difference]: With dead ends: 272 [2022-02-15 02:02:07,637 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 02:02:07,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:07,637 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:07,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 31 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:02:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 02:02:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 221. [2022-02-15 02:02:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-15 02:02:08,060 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 74 [2022-02-15 02:02:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:08,060 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-15 02:02:08,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-15 02:02:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:08,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:08,061 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:08,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478 [2022-02-15 02:02:08,061 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:08,061 INFO L85 PathProgramCache]: Analyzing trace with hash 471884792, now seen corresponding path program 477 times [2022-02-15 02:02:08,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:08,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219578604] [2022-02-15 02:02:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:08,062 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:08,062 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:08,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:08,063 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:08,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:08,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:08,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219578604] [2022-02-15 02:02:08,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1219578604] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:08,466 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:08,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:08,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747317060] [2022-02-15 02:02:08,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:08,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:08,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:08,467 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:09,800 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 02:02:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:09,800 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:09,801 INFO L225 Difference]: With dead ends: 278 [2022-02-15 02:02:09,801 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 02:02:09,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:09,801 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:09,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:09,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 02:02:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 223. [2022-02-15 02:02:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-15 02:02:10,240 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 74 [2022-02-15 02:02:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:10,240 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-15 02:02:10,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-15 02:02:10,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:10,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:10,241 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:10,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479 [2022-02-15 02:02:10,241 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:10,241 INFO L85 PathProgramCache]: Analyzing trace with hash -302101640, now seen corresponding path program 478 times [2022-02-15 02:02:10,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:10,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308958947] [2022-02-15 02:02:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:10,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:10,242 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:10,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:10,243 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:10,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:10,642 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:10,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308958947] [2022-02-15 02:02:10,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308958947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:10,643 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:10,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:10,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359921768] [2022-02-15 02:02:10,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:10,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:10,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:10,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:10,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:10,643 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:11,999 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 02:02:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:12,000 INFO L225 Difference]: With dead ends: 284 [2022-02-15 02:02:12,000 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 02:02:12,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:12,000 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:12,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 02:02:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 225. [2022-02-15 02:02:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-15 02:02:12,446 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 74 [2022-02-15 02:02:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:12,447 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-15 02:02:12,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:12,447 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-15 02:02:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:12,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:12,447 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:12,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480 [2022-02-15 02:02:12,447 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1073720584, now seen corresponding path program 479 times [2022-02-15 02:02:12,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:12,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14217155] [2022-02-15 02:02:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:12,448 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:12,448 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:12,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:12,449 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:12,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:12,866 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:12,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14217155] [2022-02-15 02:02:12,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [14217155] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:12,866 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:12,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:12,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987244478] [2022-02-15 02:02:12,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:12,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:12,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:12,867 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:14,277 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-15 02:02:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:14,278 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:14,278 INFO L225 Difference]: With dead ends: 290 [2022-02-15 02:02:14,278 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 02:02:14,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:14,278 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:14,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 02:02:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2022-02-15 02:02:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-15 02:02:14,734 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 74 [2022-02-15 02:02:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:14,734 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-15 02:02:14,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-15 02:02:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:14,735 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:14,735 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:14,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481 [2022-02-15 02:02:14,735 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash 429816440, now seen corresponding path program 480 times [2022-02-15 02:02:14,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:14,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701960627] [2022-02-15 02:02:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:14,736 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:14,736 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:14,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:14,737 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:15,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:15,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:15,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701960627] [2022-02-15 02:02:15,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1701960627] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:15,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:15,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:15,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526767376] [2022-02-15 02:02:15,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:15,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:15,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:15,149 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:16,549 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-15 02:02:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:16,549 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:16,550 INFO L225 Difference]: With dead ends: 296 [2022-02-15 02:02:16,550 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 02:02:16,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:16,550 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:16,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 02:02:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 229. [2022-02-15 02:02:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-15 02:02:17,016 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 74 [2022-02-15 02:02:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:17,017 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-15 02:02:17,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-15 02:02:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:17,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:17,017 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:17,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482 [2022-02-15 02:02:17,017 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2075082248, now seen corresponding path program 481 times [2022-02-15 02:02:17,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:17,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039121791] [2022-02-15 02:02:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:17,018 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:17,018 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:17,019 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:17,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:17,422 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:17,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039121791] [2022-02-15 02:02:17,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039121791] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:17,422 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:17,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:17,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552143031] [2022-02-15 02:02:17,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:17,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:17,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:17,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:17,423 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:18,849 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-15 02:02:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:18,849 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:18,850 INFO L225 Difference]: With dead ends: 302 [2022-02-15 02:02:18,850 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 02:02:18,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:18,850 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:18,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:18,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 02:02:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 231. [2022-02-15 02:02:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-15 02:02:19,322 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 74 [2022-02-15 02:02:19,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:19,322 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-15 02:02:19,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-15 02:02:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:19,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:19,323 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:19,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483 [2022-02-15 02:02:19,323 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash 193931640, now seen corresponding path program 482 times [2022-02-15 02:02:19,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:19,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016447208] [2022-02-15 02:02:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:19,324 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:19,324 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:19,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:19,324 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:19,748 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:19,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016447208] [2022-02-15 02:02:19,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1016447208] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:19,748 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:19,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:19,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979099932] [2022-02-15 02:02:19,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:19,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:19,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:19,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:19,749 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:21,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:21,209 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-15 02:02:21,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:21,209 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:21,210 INFO L225 Difference]: With dead ends: 308 [2022-02-15 02:02:21,210 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 02:02:21,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:21,210 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:21,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:02:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 02:02:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 233. [2022-02-15 02:02:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-15 02:02:21,697 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 74 [2022-02-15 02:02:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:21,697 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-15 02:02:21,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-15 02:02:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:21,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:21,698 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:21,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484 [2022-02-15 02:02:21,698 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:21,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:21,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1127108360, now seen corresponding path program 483 times [2022-02-15 02:02:21,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:21,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553406215] [2022-02-15 02:02:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:21,699 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:21,699 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:21,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:21,700 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:22,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:22,100 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:22,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553406215] [2022-02-15 02:02:22,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1553406215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:22,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:22,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:22,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210554425] [2022-02-15 02:02:22,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:22,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:22,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:22,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:22,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:22,101 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:23,569 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-15 02:02:23,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:23,569 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:23,569 INFO L225 Difference]: With dead ends: 314 [2022-02-15 02:02:23,569 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 02:02:23,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:23,570 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:23,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:23,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 02:02:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2022-02-15 02:02:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-02-15 02:02:24,053 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 74 [2022-02-15 02:02:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:24,053 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-02-15 02:02:24,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-02-15 02:02:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:24,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:24,054 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:24,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485 [2022-02-15 02:02:24,054 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash 663771256, now seen corresponding path program 484 times [2022-02-15 02:02:24,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:24,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749163255] [2022-02-15 02:02:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:24,055 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:24,055 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:24,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:24,055 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:24,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:24,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:24,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749163255] [2022-02-15 02:02:24,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749163255] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:24,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:24,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:24,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367734730] [2022-02-15 02:02:24,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:24,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:24,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:24,452 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:25,931 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-15 02:02:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:25,931 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:25,931 INFO L225 Difference]: With dead ends: 320 [2022-02-15 02:02:25,931 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 02:02:25,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:25,932 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:25,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 17 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:25,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 02:02:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 237. [2022-02-15 02:02:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-02-15 02:02:26,419 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 74 [2022-02-15 02:02:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:26,419 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-02-15 02:02:26,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-02-15 02:02:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:26,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:26,419 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:26,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486 [2022-02-15 02:02:26,420 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:26,420 INFO L85 PathProgramCache]: Analyzing trace with hash -582803464, now seen corresponding path program 485 times [2022-02-15 02:02:26,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:26,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857552053] [2022-02-15 02:02:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:26,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:26,421 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:26,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:26,421 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:26,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:26,828 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:26,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857552053] [2022-02-15 02:02:26,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [857552053] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:26,828 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:26,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:26,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362144871] [2022-02-15 02:02:26,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:26,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:26,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:26,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:26,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:26,829 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:28,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:28,331 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-15 02:02:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:28,332 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:28,332 INFO L225 Difference]: With dead ends: 326 [2022-02-15 02:02:28,332 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 02:02:28,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:28,333 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:28,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 02:02:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 239. [2022-02-15 02:02:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-02-15 02:02:28,839 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 74 [2022-02-15 02:02:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:28,840 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-02-15 02:02:28,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-02-15 02:02:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:28,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:28,840 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:28,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487 [2022-02-15 02:02:28,840 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:28,840 INFO L85 PathProgramCache]: Analyzing trace with hash -245233800, now seen corresponding path program 486 times [2022-02-15 02:02:28,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:28,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023507809] [2022-02-15 02:02:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:28,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:28,841 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:28,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:28,842 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:29,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:29,245 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:29,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023507809] [2022-02-15 02:02:29,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1023507809] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:29,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:29,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:29,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805109797] [2022-02-15 02:02:29,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:29,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:29,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:29,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:29,246 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:30,756 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-15 02:02:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:30,757 INFO L225 Difference]: With dead ends: 332 [2022-02-15 02:02:30,757 INFO L226 Difference]: Without dead ends: 326 [2022-02-15 02:02:30,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:30,758 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:30,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-15 02:02:31,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 241. [2022-02-15 02:02:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-02-15 02:02:31,262 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 74 [2022-02-15 02:02:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:31,263 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-02-15 02:02:31,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-02-15 02:02:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:31,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:31,263 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:31,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable488 [2022-02-15 02:02:31,263 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2036666104, now seen corresponding path program 487 times [2022-02-15 02:02:31,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:31,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064221651] [2022-02-15 02:02:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:31,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:31,264 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:31,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:31,265 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:31,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:31,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:31,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064221651] [2022-02-15 02:02:31,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064221651] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:31,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:31,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:31,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386192790] [2022-02-15 02:02:31,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:31,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:31,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:31,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:31,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:31,665 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:33,197 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-15 02:02:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:33,198 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:33,198 INFO L225 Difference]: With dead ends: 338 [2022-02-15 02:02:33,198 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 02:02:33,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:33,199 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:33,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 02:02:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 243. [2022-02-15 02:02:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-02-15 02:02:33,702 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 74 [2022-02-15 02:02:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:33,702 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-02-15 02:02:33,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-02-15 02:02:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:33,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:33,703 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:33,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489 [2022-02-15 02:02:33,703 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:33,703 INFO L85 PathProgramCache]: Analyzing trace with hash 214185592, now seen corresponding path program 488 times [2022-02-15 02:02:33,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:33,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901416663] [2022-02-15 02:02:33,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:33,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:33,704 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:33,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:33,705 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:34,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:34,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:34,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901416663] [2022-02-15 02:02:34,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901416663] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:34,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:34,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:34,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940684103] [2022-02-15 02:02:34,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:34,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:34,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:34,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:34,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:34,108 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:35,649 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-15 02:02:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:35,649 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:35,649 INFO L225 Difference]: With dead ends: 344 [2022-02-15 02:02:35,649 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 02:02:35,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:35,650 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:35,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 02:02:36,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 245. [2022-02-15 02:02:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-02-15 02:02:36,168 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 74 [2022-02-15 02:02:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:36,168 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-02-15 02:02:36,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:36,168 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-02-15 02:02:36,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:36,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:36,169 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:36,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490 [2022-02-15 02:02:36,169 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1157070328, now seen corresponding path program 489 times [2022-02-15 02:02:36,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:36,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181560122] [2022-02-15 02:02:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:36,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:36,170 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:36,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:36,171 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:36,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:36,578 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:36,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181560122] [2022-02-15 02:02:36,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [181560122] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:36,578 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:36,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:36,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292779568] [2022-02-15 02:02:36,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:36,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:36,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:36,579 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:38,165 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-02-15 02:02:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:38,166 INFO L225 Difference]: With dead ends: 350 [2022-02-15 02:02:38,166 INFO L226 Difference]: Without dead ends: 344 [2022-02-15 02:02:38,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:38,167 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:38,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:02:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-15 02:02:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 247. [2022-02-15 02:02:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-02-15 02:02:38,682 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 74 [2022-02-15 02:02:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:38,682 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-02-15 02:02:38,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-02-15 02:02:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:38,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:38,683 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:38,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491 [2022-02-15 02:02:38,683 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1031202168, now seen corresponding path program 490 times [2022-02-15 02:02:38,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:38,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167217544] [2022-02-15 02:02:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:38,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:38,684 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:38,685 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:39,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:39,090 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:39,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167217544] [2022-02-15 02:02:39,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167217544] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:39,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:39,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:39,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81237739] [2022-02-15 02:02:39,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:39,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:39,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:39,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:39,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:39,091 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:40,677 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-02-15 02:02:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:40,677 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:40,678 INFO L225 Difference]: With dead ends: 356 [2022-02-15 02:02:40,678 INFO L226 Difference]: Without dead ends: 350 [2022-02-15 02:02:40,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:40,678 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:40,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-15 02:02:41,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 249. [2022-02-15 02:02:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-02-15 02:02:41,197 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 74 [2022-02-15 02:02:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:41,197 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-02-15 02:02:41,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-02-15 02:02:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:41,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:41,197 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:41,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492 [2022-02-15 02:02:41,197 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:41,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:41,198 INFO L85 PathProgramCache]: Analyzing trace with hash 330984696, now seen corresponding path program 491 times [2022-02-15 02:02:41,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:41,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430888273] [2022-02-15 02:02:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:41,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:41,198 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:41,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:41,199 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:41,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:41,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:41,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430888273] [2022-02-15 02:02:41,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430888273] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:41,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:41,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:41,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435484686] [2022-02-15 02:02:41,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:41,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:41,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:41,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:41,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:41,599 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:43,170 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-02-15 02:02:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:43,170 INFO L225 Difference]: With dead ends: 362 [2022-02-15 02:02:43,171 INFO L226 Difference]: Without dead ends: 356 [2022-02-15 02:02:43,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:43,171 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:43,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 17 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:43,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-15 02:02:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 251. [2022-02-15 02:02:43,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.4878048780487805) internal successors, (366), 246 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 370 transitions. [2022-02-15 02:02:43,695 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 370 transitions. Word has length 74 [2022-02-15 02:02:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:43,695 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 370 transitions. [2022-02-15 02:02:43,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 370 transitions. [2022-02-15 02:02:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:43,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:43,696 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:43,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493 [2022-02-15 02:02:43,696 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:43,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1731859576, now seen corresponding path program 492 times [2022-02-15 02:02:43,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:43,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290624602] [2022-02-15 02:02:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:43,697 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:43,697 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:43,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:43,698 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:44,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:44,090 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:44,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290624602] [2022-02-15 02:02:44,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1290624602] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:44,090 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:44,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:44,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922773328] [2022-02-15 02:02:44,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:44,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:44,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:44,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:44,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:44,091 INFO L87 Difference]: Start difference. First operand 251 states and 370 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:45,666 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-02-15 02:02:45,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:45,667 INFO L225 Difference]: With dead ends: 368 [2022-02-15 02:02:45,667 INFO L226 Difference]: Without dead ends: 362 [2022-02-15 02:02:45,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:45,668 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:45,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 21 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-15 02:02:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 253. [2022-02-15 02:02:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.4879032258064515) internal successors, (369), 248 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 373 transitions. [2022-02-15 02:02:46,196 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 373 transitions. Word has length 74 [2022-02-15 02:02:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:46,197 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 373 transitions. [2022-02-15 02:02:46,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:46,197 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 373 transitions. [2022-02-15 02:02:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:46,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:46,197 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:46,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494 [2022-02-15 02:02:46,197 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:46,197 INFO L85 PathProgramCache]: Analyzing trace with hash -647111688, now seen corresponding path program 493 times [2022-02-15 02:02:46,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:46,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018907460] [2022-02-15 02:02:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:46,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:46,198 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:46,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:46,199 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:46,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:46,597 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:46,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018907460] [2022-02-15 02:02:46,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2018907460] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:46,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:46,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:46,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282010787] [2022-02-15 02:02:46,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:46,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:46,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:46,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:46,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:46,599 INFO L87 Difference]: Start difference. First operand 253 states and 373 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:48,195 INFO L93 Difference]: Finished difference Result 374 states and 551 transitions. [2022-02-15 02:02:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:48,195 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:48,196 INFO L225 Difference]: With dead ends: 374 [2022-02-15 02:02:48,196 INFO L226 Difference]: Without dead ends: 368 [2022-02-15 02:02:48,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:48,196 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:48,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:48,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-15 02:02:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 255. [2022-02-15 02:02:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.488) internal successors, (372), 250 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 376 transitions. [2022-02-15 02:02:48,733 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 376 transitions. Word has length 74 [2022-02-15 02:02:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:48,733 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 376 transitions. [2022-02-15 02:02:48,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:48,733 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 376 transitions. [2022-02-15 02:02:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:48,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:48,734 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:48,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495 [2022-02-15 02:02:48,734 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1915894920, now seen corresponding path program 494 times [2022-02-15 02:02:48,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:48,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395527879] [2022-02-15 02:02:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:48,735 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:48,735 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:48,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:48,735 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:49,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:49,128 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:49,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395527879] [2022-02-15 02:02:49,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [395527879] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:49,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:49,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:49,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814704732] [2022-02-15 02:02:49,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:49,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:49,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:49,129 INFO L87 Difference]: Start difference. First operand 255 states and 376 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:50,729 INFO L93 Difference]: Finished difference Result 380 states and 560 transitions. [2022-02-15 02:02:50,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:50,729 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:50,730 INFO L225 Difference]: With dead ends: 380 [2022-02-15 02:02:50,730 INFO L226 Difference]: Without dead ends: 374 [2022-02-15 02:02:50,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:50,730 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:50,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 23 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:50,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-15 02:02:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 257. [2022-02-15 02:02:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 379 transitions. [2022-02-15 02:02:51,254 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 379 transitions. Word has length 74 [2022-02-15 02:02:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:51,254 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 379 transitions. [2022-02-15 02:02:51,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 379 transitions. [2022-02-15 02:02:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:02:51,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:51,255 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:51,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496 [2022-02-15 02:02:51,255 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1445868808, now seen corresponding path program 495 times [2022-02-15 02:02:51,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:51,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539929328] [2022-02-15 02:02:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:51,256 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:51,256 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:51,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:51,257 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:51,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:51,656 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:51,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539929328] [2022-02-15 02:02:51,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [539929328] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:51,657 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:51,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:02:51,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876296455] [2022-02-15 02:02:51,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:51,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:02:51,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:02:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:02:51,657 INFO L87 Difference]: Start difference. First operand 257 states and 379 transitions. Second operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:53,088 INFO L93 Difference]: Finished difference Result 324 states and 476 transitions. [2022-02-15 02:02:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:02:53,088 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 02:02:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:53,089 INFO L225 Difference]: With dead ends: 324 [2022-02-15 02:02:53,089 INFO L226 Difference]: Without dead ends: 318 [2022-02-15 02:02:53,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1754, Invalid=2938, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:02:53,089 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:53,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 19 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-15 02:02:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 199. [2022-02-15 02:02:53,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.4845360824742269) internal successors, (288), 194 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 292 transitions. [2022-02-15 02:02:53,446 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 292 transitions. Word has length 74 [2022-02-15 02:02:53,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:53,447 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 292 transitions. [2022-02-15 02:02:53,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 292 transitions. [2022-02-15 02:02:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:02:53,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:53,447 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:53,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497 [2022-02-15 02:02:53,447 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:53,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:53,447 INFO L85 PathProgramCache]: Analyzing trace with hash 705998171, now seen corresponding path program 496 times [2022-02-15 02:02:53,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:53,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371303796] [2022-02-15 02:02:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:53,448 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:53,448 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:53,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:53,449 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:53,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:53,862 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:53,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371303796] [2022-02-15 02:02:53,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [371303796] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:53,862 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:53,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:02:53,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510811554] [2022-02-15 02:02:53,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:53,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:02:53,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:53,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:02:53,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:02:53,863 INFO L87 Difference]: Start difference. First operand 199 states and 292 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:55,018 INFO L93 Difference]: Finished difference Result 214 states and 312 transitions. [2022-02-15 02:02:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:02:55,018 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:02:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:55,018 INFO L225 Difference]: With dead ends: 214 [2022-02-15 02:02:55,019 INFO L226 Difference]: Without dead ends: 208 [2022-02-15 02:02:55,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:02:55,019 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:55,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 19 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-15 02:02:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2022-02-15 02:02:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.4848484848484849) internal successors, (294), 198 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 298 transitions. [2022-02-15 02:02:55,384 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 298 transitions. Word has length 76 [2022-02-15 02:02:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:55,385 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 298 transitions. [2022-02-15 02:02:55,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:55,385 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 298 transitions. [2022-02-15 02:02:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:02:55,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:55,385 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:55,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498 [2022-02-15 02:02:55,385 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash -388950821, now seen corresponding path program 497 times [2022-02-15 02:02:55,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:55,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633925367] [2022-02-15 02:02:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:55,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:55,386 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:55,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:55,387 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:55,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:55,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:55,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633925367] [2022-02-15 02:02:55,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1633925367] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:55,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:55,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:02:55,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424672886] [2022-02-15 02:02:55,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:55,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:02:55,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:02:55,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:02:55,802 INFO L87 Difference]: Start difference. First operand 203 states and 298 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:56,977 INFO L93 Difference]: Finished difference Result 218 states and 317 transitions. [2022-02-15 02:02:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:02:56,977 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:02:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:56,978 INFO L225 Difference]: With dead ends: 218 [2022-02-15 02:02:56,978 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 02:02:56,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:02:56,978 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:56,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 17 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:02:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 02:02:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 207. [2022-02-15 02:02:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 202 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 304 transitions. [2022-02-15 02:02:57,365 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 304 transitions. Word has length 76 [2022-02-15 02:02:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:57,365 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 304 transitions. [2022-02-15 02:02:57,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 304 transitions. [2022-02-15 02:02:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:02:57,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:57,366 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:57,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable499 [2022-02-15 02:02:57,366 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:57,366 INFO L85 PathProgramCache]: Analyzing trace with hash -367944613, now seen corresponding path program 498 times [2022-02-15 02:02:57,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:57,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274258048] [2022-02-15 02:02:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:57,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:57,369 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:57,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:57,369 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:57,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:57,790 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:57,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274258048] [2022-02-15 02:02:57,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274258048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:57,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:57,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:02:57,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741982283] [2022-02-15 02:02:57,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:57,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:02:57,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:02:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:02:57,791 INFO L87 Difference]: Start difference. First operand 207 states and 304 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:58,975 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 02:02:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:02:58,975 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:02:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:58,975 INFO L225 Difference]: With dead ends: 224 [2022-02-15 02:02:58,975 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 02:02:58,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:02:58,976 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:58,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:02:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 02:02:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 209. [2022-02-15 02:02:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-15 02:02:59,362 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 76 [2022-02-15 02:02:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:59,362 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-15 02:02:59,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-15 02:02:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:02:59,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:59,362 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:59,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500 [2022-02-15 02:02:59,362 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1655815205, now seen corresponding path program 499 times [2022-02-15 02:02:59,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:59,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904086399] [2022-02-15 02:02:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:59,363 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:02:59,363 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:02:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:59,364 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:02:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:59,786 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:59,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904086399] [2022-02-15 02:02:59,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904086399] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:59,786 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:59,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:02:59,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396766316] [2022-02-15 02:02:59,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:59,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:02:59,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:59,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:02:59,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:02:59,787 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:00,991 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 02:03:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:00,991 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:00,992 INFO L225 Difference]: With dead ends: 230 [2022-02-15 02:03:00,992 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 02:03:00,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:00,992 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:00,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 02:03:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 211. [2022-02-15 02:03:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-15 02:03:01,394 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 76 [2022-02-15 02:03:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:01,394 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-15 02:03:01,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-15 02:03:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:01,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:01,395 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:01,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501 [2022-02-15 02:03:01,395 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:01,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1946094427, now seen corresponding path program 500 times [2022-02-15 02:03:01,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:01,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141143543] [2022-02-15 02:03:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:01,396 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:01,396 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:01,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:01,396 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:01,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:01,811 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:01,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141143543] [2022-02-15 02:03:01,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1141143543] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:01,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:01,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:01,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383868801] [2022-02-15 02:03:01,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:01,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:01,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:01,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:01,812 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:03,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:03,035 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 02:03:03,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:03,036 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:03,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:03,036 INFO L225 Difference]: With dead ends: 236 [2022-02-15 02:03:03,036 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 02:03:03,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:03,037 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:03,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 02:03:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 213. [2022-02-15 02:03:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-15 02:03:03,443 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 76 [2022-02-15 02:03:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:03,443 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-15 02:03:03,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:03,443 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-15 02:03:03,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:03,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:03,444 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:03,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502 [2022-02-15 02:03:03,444 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1637610203, now seen corresponding path program 501 times [2022-02-15 02:03:03,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:03,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523785057] [2022-02-15 02:03:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:03,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:03,445 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:03,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:03,445 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:03,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:03,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:03,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523785057] [2022-02-15 02:03:03,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1523785057] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:03,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:03,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:03,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709579825] [2022-02-15 02:03:03,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:03,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:03,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:03,864 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:05,111 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 02:03:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:05,112 INFO L225 Difference]: With dead ends: 242 [2022-02-15 02:03:05,112 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 02:03:05,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:05,112 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:05,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 02:03:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 215. [2022-02-15 02:03:05,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-15 02:03:05,522 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 76 [2022-02-15 02:03:05,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:05,522 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-15 02:03:05,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-15 02:03:05,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:05,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:05,523 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:05,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503 [2022-02-15 02:03:05,523 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1537014363, now seen corresponding path program 502 times [2022-02-15 02:03:05,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:05,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631688519] [2022-02-15 02:03:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:05,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:05,524 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:05,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:05,524 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:05,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:05,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:05,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631688519] [2022-02-15 02:03:05,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [631688519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:05,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:05,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:05,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212501737] [2022-02-15 02:03:05,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:05,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:05,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:05,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:05,938 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:07,213 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 02:03:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:07,213 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:07,213 INFO L225 Difference]: With dead ends: 248 [2022-02-15 02:03:07,213 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 02:03:07,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:07,214 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:07,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 15 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 02:03:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 217. [2022-02-15 02:03:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-15 02:03:07,631 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 76 [2022-02-15 02:03:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:07,632 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-15 02:03:07,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-15 02:03:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:07,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:07,632 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:07,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504 [2022-02-15 02:03:07,632 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:07,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:07,632 INFO L85 PathProgramCache]: Analyzing trace with hash -646307365, now seen corresponding path program 503 times [2022-02-15 02:03:07,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:07,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830802297] [2022-02-15 02:03:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:07,633 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:07,633 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:07,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:07,634 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:08,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:08,054 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:08,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830802297] [2022-02-15 02:03:08,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [830802297] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:08,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:08,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:08,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596349474] [2022-02-15 02:03:08,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:08,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:08,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:08,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:08,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:08,056 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:09,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:09,343 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 02:03:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:09,343 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:09,344 INFO L225 Difference]: With dead ends: 254 [2022-02-15 02:03:09,344 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 02:03:09,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:09,344 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:09,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 02:03:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 219. [2022-02-15 02:03:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-15 02:03:09,777 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 76 [2022-02-15 02:03:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:09,777 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-15 02:03:09,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-15 02:03:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:09,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:09,778 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:09,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505 [2022-02-15 02:03:09,778 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:09,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1420519771, now seen corresponding path program 504 times [2022-02-15 02:03:09,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:09,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165638710] [2022-02-15 02:03:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:09,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:09,779 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:09,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:09,779 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:10,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:10,197 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:10,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165638710] [2022-02-15 02:03:10,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [165638710] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:10,197 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:10,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:10,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99859239] [2022-02-15 02:03:10,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:10,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:10,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:10,198 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:11,509 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 02:03:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:11,509 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:11,509 INFO L225 Difference]: With dead ends: 260 [2022-02-15 02:03:11,509 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 02:03:11,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:11,510 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:11,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 02:03:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 221. [2022-02-15 02:03:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-15 02:03:11,950 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 76 [2022-02-15 02:03:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:11,950 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-15 02:03:11,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-15 02:03:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:11,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:11,950 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:11,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506 [2022-02-15 02:03:11,951 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:11,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash -928460581, now seen corresponding path program 505 times [2022-02-15 02:03:11,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:11,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652535190] [2022-02-15 02:03:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:11,952 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:11,952 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:11,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:11,952 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:12,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:12,371 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:12,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652535190] [2022-02-15 02:03:12,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1652535190] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:12,371 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:12,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:12,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627007693] [2022-02-15 02:03:12,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:12,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:12,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:12,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:12,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:12,372 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:13,734 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 02:03:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:13,734 INFO L225 Difference]: With dead ends: 266 [2022-02-15 02:03:13,734 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 02:03:13,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:13,735 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:13,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:03:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 02:03:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 223. [2022-02-15 02:03:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-15 02:03:14,179 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 76 [2022-02-15 02:03:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:14,179 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-15 02:03:14,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-15 02:03:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:14,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:14,179 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:14,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507 [2022-02-15 02:03:14,179 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:14,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:14,180 INFO L85 PathProgramCache]: Analyzing trace with hash 854218843, now seen corresponding path program 506 times [2022-02-15 02:03:14,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:14,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894869825] [2022-02-15 02:03:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:14,180 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:14,181 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:14,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:14,181 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:14,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:14,595 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:14,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894869825] [2022-02-15 02:03:14,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [894869825] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:14,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:14,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:14,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239283809] [2022-02-15 02:03:14,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:14,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:14,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:14,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:14,596 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:15,955 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 02:03:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:15,956 INFO L225 Difference]: With dead ends: 272 [2022-02-15 02:03:15,956 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 02:03:15,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:15,956 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:15,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 02:03:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 225. [2022-02-15 02:03:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-15 02:03:16,407 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 76 [2022-02-15 02:03:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:16,407 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-15 02:03:16,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-15 02:03:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:16,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:16,408 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:16,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508 [2022-02-15 02:03:16,408 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:16,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash 317194203, now seen corresponding path program 507 times [2022-02-15 02:03:16,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:16,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714540587] [2022-02-15 02:03:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:16,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:16,409 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:16,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:16,410 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:16,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:16,823 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:16,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714540587] [2022-02-15 02:03:16,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1714540587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:16,824 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:16,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:16,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564318174] [2022-02-15 02:03:16,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:16,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:16,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:16,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:16,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:16,824 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:18,208 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 02:03:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:18,208 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:18,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:18,208 INFO L225 Difference]: With dead ends: 278 [2022-02-15 02:03:18,208 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 02:03:18,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:18,209 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:18,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 02:03:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 227. [2022-02-15 02:03:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-15 02:03:18,673 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 76 [2022-02-15 02:03:18,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:18,673 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-15 02:03:18,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-15 02:03:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:18,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:18,674 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:18,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509 [2022-02-15 02:03:18,674 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:18,674 INFO L85 PathProgramCache]: Analyzing trace with hash -367409317, now seen corresponding path program 508 times [2022-02-15 02:03:18,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:18,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855509776] [2022-02-15 02:03:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:18,675 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:18,675 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:18,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:18,676 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:19,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:19,088 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:19,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855509776] [2022-02-15 02:03:19,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [855509776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:19,088 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:19,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:19,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804516065] [2022-02-15 02:03:19,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:19,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:19,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:19,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:19,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:19,089 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:20,498 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 02:03:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:20,499 INFO L225 Difference]: With dead ends: 284 [2022-02-15 02:03:20,499 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 02:03:20,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:20,499 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:20,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 02:03:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 229. [2022-02-15 02:03:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-15 02:03:20,976 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 76 [2022-02-15 02:03:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:20,976 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-15 02:03:20,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-15 02:03:20,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:20,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:20,976 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:20,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable510 [2022-02-15 02:03:20,976 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:20,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1141395749, now seen corresponding path program 509 times [2022-02-15 02:03:20,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:20,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837027647] [2022-02-15 02:03:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:20,978 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:20,978 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:20,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:20,978 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:21,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:21,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:21,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837027647] [2022-02-15 02:03:21,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [837027647] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:21,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:21,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:21,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304057539] [2022-02-15 02:03:21,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:21,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:21,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:21,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:21,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:21,395 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:22,824 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-15 02:03:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:22,824 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:22,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:22,825 INFO L225 Difference]: With dead ends: 290 [2022-02-15 02:03:22,825 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 02:03:22,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:22,825 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:22,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 02:03:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 231. [2022-02-15 02:03:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-15 02:03:23,310 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 76 [2022-02-15 02:03:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:23,310 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-15 02:03:23,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-15 02:03:23,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:23,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:23,310 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:23,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511 [2022-02-15 02:03:23,311 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1913014693, now seen corresponding path program 510 times [2022-02-15 02:03:23,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:23,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883561163] [2022-02-15 02:03:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:23,312 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:23,312 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:23,312 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:23,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:23,732 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:23,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883561163] [2022-02-15 02:03:23,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [883561163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:23,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:23,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:23,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356192454] [2022-02-15 02:03:23,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:23,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:23,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:23,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:23,733 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:25,192 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-15 02:03:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:25,193 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:25,193 INFO L225 Difference]: With dead ends: 296 [2022-02-15 02:03:25,193 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 02:03:25,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:25,194 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:25,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 02:03:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 233. [2022-02-15 02:03:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-15 02:03:25,683 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 76 [2022-02-15 02:03:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:25,683 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-15 02:03:25,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-15 02:03:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:25,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:25,683 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:25,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512 [2022-02-15 02:03:25,684 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash -409477669, now seen corresponding path program 511 times [2022-02-15 02:03:25,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:25,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146849372] [2022-02-15 02:03:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:25,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:25,685 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:25,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:25,685 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:26,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:26,100 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:26,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146849372] [2022-02-15 02:03:26,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [146849372] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:26,101 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:26,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:26,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137940301] [2022-02-15 02:03:26,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:26,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:26,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:26,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:26,102 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:27,585 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-15 02:03:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:27,585 INFO L225 Difference]: With dead ends: 302 [2022-02-15 02:03:27,585 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 02:03:27,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:27,586 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:27,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 02:03:28,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 235. [2022-02-15 02:03:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-02-15 02:03:28,086 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 76 [2022-02-15 02:03:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:28,086 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-02-15 02:03:28,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-02-15 02:03:28,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:28,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:28,086 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:28,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513 [2022-02-15 02:03:28,087 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:28,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:28,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1380590939, now seen corresponding path program 512 times [2022-02-15 02:03:28,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:28,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349786356] [2022-02-15 02:03:28,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:28,088 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:28,088 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:28,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:28,088 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:28,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:28,509 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:28,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349786356] [2022-02-15 02:03:28,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1349786356] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:28,510 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:28,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:28,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941434357] [2022-02-15 02:03:28,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:28,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:28,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:28,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:28,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:28,510 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:30,031 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-15 02:03:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:30,031 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:30,032 INFO L225 Difference]: With dead ends: 308 [2022-02-15 02:03:30,032 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 02:03:30,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:30,032 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:30,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:30,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 02:03:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 237. [2022-02-15 02:03:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-02-15 02:03:30,538 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 76 [2022-02-15 02:03:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:30,538 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-02-15 02:03:30,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-02-15 02:03:30,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:30,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:30,538 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:30,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514 [2022-02-15 02:03:30,539 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:30,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash -645362469, now seen corresponding path program 513 times [2022-02-15 02:03:30,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:30,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527394520] [2022-02-15 02:03:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:30,540 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:30,540 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:30,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:30,540 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:30,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:30,955 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:30,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527394520] [2022-02-15 02:03:30,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [527394520] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:30,955 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:30,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:30,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133191248] [2022-02-15 02:03:30,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:30,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:30,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:30,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:30,956 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:32,477 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-15 02:03:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:32,477 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:32,478 INFO L225 Difference]: With dead ends: 314 [2022-02-15 02:03:32,478 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 02:03:32,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:32,478 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:32,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 25 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 02:03:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 239. [2022-02-15 02:03:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-02-15 02:03:32,987 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 76 [2022-02-15 02:03:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:32,987 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-02-15 02:03:32,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-02-15 02:03:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:32,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:32,988 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:32,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515 [2022-02-15 02:03:32,988 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1966402469, now seen corresponding path program 514 times [2022-02-15 02:03:32,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:32,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026043230] [2022-02-15 02:03:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:32,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:32,989 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:32,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:32,989 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:33,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:33,404 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:33,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026043230] [2022-02-15 02:03:33,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026043230] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:33,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:33,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:33,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726881392] [2022-02-15 02:03:33,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:33,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:33,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:33,405 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:34,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:34,958 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-15 02:03:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:34,958 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:34,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:34,959 INFO L225 Difference]: With dead ends: 320 [2022-02-15 02:03:34,959 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 02:03:34,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:34,959 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:34,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 27 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:03:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 02:03:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 241. [2022-02-15 02:03:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-02-15 02:03:35,476 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 76 [2022-02-15 02:03:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:35,476 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-02-15 02:03:35,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-02-15 02:03:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:35,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:35,477 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:35,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516 [2022-02-15 02:03:35,477 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash -175522853, now seen corresponding path program 515 times [2022-02-15 02:03:35,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:35,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715024730] [2022-02-15 02:03:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:35,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:35,478 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:35,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:35,479 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:35,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:35,894 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:35,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715024730] [2022-02-15 02:03:35,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [715024730] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:35,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:35,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:35,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90095059] [2022-02-15 02:03:35,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:35,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:35,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:35,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:35,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:35,895 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:37,464 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-15 02:03:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:37,465 INFO L225 Difference]: With dead ends: 326 [2022-02-15 02:03:37,465 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 02:03:37,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:37,465 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:37,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:37,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 02:03:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 243. [2022-02-15 02:03:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-02-15 02:03:37,997 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 76 [2022-02-15 02:03:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:37,997 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-02-15 02:03:37,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-02-15 02:03:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:37,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:37,998 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:37,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517 [2022-02-15 02:03:37,998 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:37,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1422097573, now seen corresponding path program 516 times [2022-02-15 02:03:37,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:37,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368904192] [2022-02-15 02:03:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:37,999 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:37,999 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:37,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:38,000 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:38,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:38,415 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:38,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368904192] [2022-02-15 02:03:38,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368904192] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:38,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:38,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:38,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216657386] [2022-02-15 02:03:38,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:38,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:38,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:38,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:38,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:38,416 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:40,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:40,012 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-15 02:03:40,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:40,012 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:40,013 INFO L225 Difference]: With dead ends: 332 [2022-02-15 02:03:40,013 INFO L226 Difference]: Without dead ends: 326 [2022-02-15 02:03:40,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:40,013 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:40,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-15 02:03:40,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 245. [2022-02-15 02:03:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-02-15 02:03:40,548 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 76 [2022-02-15 02:03:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:40,548 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-02-15 02:03:40,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-02-15 02:03:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:40,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:40,549 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:40,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518 [2022-02-15 02:03:40,549 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1084527909, now seen corresponding path program 517 times [2022-02-15 02:03:40,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:40,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278552972] [2022-02-15 02:03:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:40,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:40,550 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:40,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:40,550 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:40,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:40,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:40,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278552972] [2022-02-15 02:03:40,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1278552972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:40,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:40,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:40,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047407445] [2022-02-15 02:03:40,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:40,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:40,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:40,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:40,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:40,967 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:42,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:42,569 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-15 02:03:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:42,570 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:42,570 INFO L225 Difference]: With dead ends: 338 [2022-02-15 02:03:42,570 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 02:03:42,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:42,570 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:42,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 02:03:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 247. [2022-02-15 02:03:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-02-15 02:03:43,113 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 76 [2022-02-15 02:03:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:43,113 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-02-15 02:03:43,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:43,113 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-02-15 02:03:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:43,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:43,113 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:43,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519 [2022-02-15 02:03:43,113 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1197371995, now seen corresponding path program 518 times [2022-02-15 02:03:43,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:43,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195447329] [2022-02-15 02:03:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:43,114 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:43,114 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:43,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:43,115 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:43,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:43,529 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:43,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195447329] [2022-02-15 02:03:43,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1195447329] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:43,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:43,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:43,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448727891] [2022-02-15 02:03:43,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:43,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:43,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:43,530 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:45,159 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-15 02:03:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:45,159 INFO L225 Difference]: With dead ends: 344 [2022-02-15 02:03:45,159 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 02:03:45,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:45,160 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:45,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 25 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 02:03:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 249. [2022-02-15 02:03:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-02-15 02:03:45,711 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 76 [2022-02-15 02:03:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:45,711 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-02-15 02:03:45,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-02-15 02:03:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:45,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:45,711 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:45,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520 [2022-02-15 02:03:45,712 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:45,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash -625108517, now seen corresponding path program 519 times [2022-02-15 02:03:45,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:45,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87398986] [2022-02-15 02:03:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:45,713 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:45,713 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:45,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:45,713 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:46,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:46,157 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:46,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87398986] [2022-02-15 02:03:46,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [87398986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:46,158 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:46,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:46,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394872198] [2022-02-15 02:03:46,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:46,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:46,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:46,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:46,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:46,159 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:47,799 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-02-15 02:03:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:47,800 INFO L225 Difference]: With dead ends: 350 [2022-02-15 02:03:47,800 INFO L226 Difference]: Without dead ends: 344 [2022-02-15 02:03:47,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:47,800 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:47,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-15 02:03:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 251. [2022-02-15 02:03:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.4878048780487805) internal successors, (366), 246 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 370 transitions. [2022-02-15 02:03:48,353 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 370 transitions. Word has length 76 [2022-02-15 02:03:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:48,353 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 370 transitions. [2022-02-15 02:03:48,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 370 transitions. [2022-02-15 02:03:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:48,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:48,353 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:48,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable521 [2022-02-15 02:03:48,353 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:48,354 INFO L85 PathProgramCache]: Analyzing trace with hash 317776219, now seen corresponding path program 520 times [2022-02-15 02:03:48,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:48,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398152879] [2022-02-15 02:03:48,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:48,354 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:48,355 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:48,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:48,355 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:48,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:48,769 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:48,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398152879] [2022-02-15 02:03:48,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [398152879] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:48,769 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:48,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:48,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509474075] [2022-02-15 02:03:48,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:48,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:48,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:48,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:48,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:48,770 INFO L87 Difference]: Start difference. First operand 251 states and 370 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:50,427 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-02-15 02:03:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:50,427 INFO L225 Difference]: With dead ends: 356 [2022-02-15 02:03:50,427 INFO L226 Difference]: Without dead ends: 350 [2022-02-15 02:03:50,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:50,428 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:50,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-15 02:03:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 253. [2022-02-15 02:03:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.4879032258064515) internal successors, (369), 248 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 373 transitions. [2022-02-15 02:03:50,990 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 373 transitions. Word has length 76 [2022-02-15 02:03:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:50,990 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 373 transitions. [2022-02-15 02:03:50,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:50,990 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 373 transitions. [2022-02-15 02:03:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:50,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:50,991 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:50,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522 [2022-02-15 02:03:50,991 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:50,991 INFO L85 PathProgramCache]: Analyzing trace with hash 191908059, now seen corresponding path program 521 times [2022-02-15 02:03:50,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:50,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726498143] [2022-02-15 02:03:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:50,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:50,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:50,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:50,993 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:51,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:51,410 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:51,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726498143] [2022-02-15 02:03:51,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [726498143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:51,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:51,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:51,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290385117] [2022-02-15 02:03:51,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:51,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:51,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:51,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:51,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:51,411 INFO L87 Difference]: Start difference. First operand 253 states and 373 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:53,083 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-02-15 02:03:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:53,083 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:53,083 INFO L225 Difference]: With dead ends: 362 [2022-02-15 02:03:53,083 INFO L226 Difference]: Without dead ends: 356 [2022-02-15 02:03:53,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:53,084 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:53,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-15 02:03:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 255. [2022-02-15 02:03:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.488) internal successors, (372), 250 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 376 transitions. [2022-02-15 02:03:53,639 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 376 transitions. Word has length 76 [2022-02-15 02:03:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:53,639 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 376 transitions. [2022-02-15 02:03:53,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 376 transitions. [2022-02-15 02:03:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:53,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:53,640 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:53,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523 [2022-02-15 02:03:53,640 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:53,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash -508309413, now seen corresponding path program 522 times [2022-02-15 02:03:53,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:53,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678235233] [2022-02-15 02:03:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:53,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:53,641 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:53,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:53,642 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:54,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:54,060 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:54,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678235233] [2022-02-15 02:03:54,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678235233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:54,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:54,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:54,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830474795] [2022-02-15 02:03:54,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:54,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:54,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:54,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:54,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:54,061 INFO L87 Difference]: Start difference. First operand 255 states and 376 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:55,746 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-02-15 02:03:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:55,746 INFO L225 Difference]: With dead ends: 368 [2022-02-15 02:03:55,747 INFO L226 Difference]: Without dead ends: 362 [2022-02-15 02:03:55,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:55,747 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:55,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 17 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-15 02:03:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 257. [2022-02-15 02:03:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 379 transitions. [2022-02-15 02:03:56,320 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 379 transitions. Word has length 76 [2022-02-15 02:03:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:56,320 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 379 transitions. [2022-02-15 02:03:56,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 379 transitions. [2022-02-15 02:03:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:56,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:56,321 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:56,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524 [2022-02-15 02:03:56,321 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash 892565467, now seen corresponding path program 523 times [2022-02-15 02:03:56,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:56,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239203245] [2022-02-15 02:03:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:56,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:56,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:56,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:56,322 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:56,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:56,737 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:56,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239203245] [2022-02-15 02:03:56,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [239203245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:56,737 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:56,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:56,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251334129] [2022-02-15 02:03:56,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:56,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:56,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:56,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:56,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:56,738 INFO L87 Difference]: Start difference. First operand 257 states and 379 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:58,434 INFO L93 Difference]: Finished difference Result 374 states and 551 transitions. [2022-02-15 02:03:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:03:58,434 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:03:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:58,434 INFO L225 Difference]: With dead ends: 374 [2022-02-15 02:03:58,434 INFO L226 Difference]: Without dead ends: 368 [2022-02-15 02:03:58,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:03:58,435 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:58,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 29 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:03:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-15 02:03:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 259. [2022-02-15 02:03:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.4881889763779528) internal successors, (378), 254 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 382 transitions. [2022-02-15 02:03:59,008 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 382 transitions. Word has length 76 [2022-02-15 02:03:59,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:59,008 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 382 transitions. [2022-02-15 02:03:59,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:59,008 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 382 transitions. [2022-02-15 02:03:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:03:59,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:59,009 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:59,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525 [2022-02-15 02:03:59,009 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1486405797, now seen corresponding path program 524 times [2022-02-15 02:03:59,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:59,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800986689] [2022-02-15 02:03:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:59,010 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:03:59,010 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:03:59,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:59,010 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:03:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:59,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:59,431 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:59,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800986689] [2022-02-15 02:03:59,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800986689] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:59,431 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:59,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:03:59,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246318963] [2022-02-15 02:03:59,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:59,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:03:59,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:03:59,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:03:59,432 INFO L87 Difference]: Start difference. First operand 259 states and 382 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:01,135 INFO L93 Difference]: Finished difference Result 380 states and 560 transitions. [2022-02-15 02:04:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:04:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:04:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:01,136 INFO L225 Difference]: With dead ends: 380 [2022-02-15 02:04:01,136 INFO L226 Difference]: Without dead ends: 374 [2022-02-15 02:04:01,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:04:01,137 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:01,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-15 02:04:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 261. [2022-02-15 02:04:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.48828125) internal successors, (381), 256 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 385 transitions. [2022-02-15 02:04:01,710 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 385 transitions. Word has length 76 [2022-02-15 02:04:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:01,710 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 385 transitions. [2022-02-15 02:04:01,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 385 transitions. [2022-02-15 02:04:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:04:01,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:01,711 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:01,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526 [2022-02-15 02:04:01,711 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1539778267, now seen corresponding path program 525 times [2022-02-15 02:04:01,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:01,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655052897] [2022-02-15 02:04:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:01,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:01,712 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:01,713 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:02,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:02,128 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:02,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655052897] [2022-02-15 02:04:02,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655052897] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:02,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:02,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:04:02,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988651246] [2022-02-15 02:04:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:02,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:04:02,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:02,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:04:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:04:02,129 INFO L87 Difference]: Start difference. First operand 261 states and 385 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:03,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:03,833 INFO L93 Difference]: Finished difference Result 386 states and 569 transitions. [2022-02-15 02:04:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:04:03,833 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:04:03,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:03,833 INFO L225 Difference]: With dead ends: 386 [2022-02-15 02:04:03,833 INFO L226 Difference]: Without dead ends: 380 [2022-02-15 02:04:03,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:04:03,834 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:03,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 19 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-15 02:04:04,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 263. [2022-02-15 02:04:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.4883720930232558) internal successors, (384), 258 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:04,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 388 transitions. [2022-02-15 02:04:04,411 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 388 transitions. Word has length 76 [2022-02-15 02:04:04,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:04,411 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 388 transitions. [2022-02-15 02:04:04,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 388 transitions. [2022-02-15 02:04:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:04:04,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:04,412 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:04,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527 [2022-02-15 02:04:04,412 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:04,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2009804379, now seen corresponding path program 526 times [2022-02-15 02:04:04,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:04,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494276243] [2022-02-15 02:04:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:04,413 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:04,413 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:04,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:04,413 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:04,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:04,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:04,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494276243] [2022-02-15 02:04:04,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1494276243] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:04,829 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:04,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:04:04,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775058319] [2022-02-15 02:04:04,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:04,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:04:04,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:04:04,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:04:04,830 INFO L87 Difference]: Start difference. First operand 263 states and 388 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:06,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:06,541 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-02-15 02:04:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:04:06,542 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:04:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:06,542 INFO L225 Difference]: With dead ends: 392 [2022-02-15 02:04:06,542 INFO L226 Difference]: Without dead ends: 386 [2022-02-15 02:04:06,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:04:06,543 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:06,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 23 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-15 02:04:07,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 265. [2022-02-15 02:04:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.4884615384615385) internal successors, (387), 260 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 391 transitions. [2022-02-15 02:04:07,117 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 391 transitions. Word has length 76 [2022-02-15 02:04:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:07,117 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 391 transitions. [2022-02-15 02:04:07,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 391 transitions. [2022-02-15 02:04:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:04:07,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:07,117 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:07,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528 [2022-02-15 02:04:07,118 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:07,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:07,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1561635365, now seen corresponding path program 527 times [2022-02-15 02:04:07,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:07,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977502532] [2022-02-15 02:04:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:07,119 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:07,119 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:07,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:07,119 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:07,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:07,537 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:07,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977502532] [2022-02-15 02:04:07,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977502532] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:07,537 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:07,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:04:07,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180432625] [2022-02-15 02:04:07,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:07,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:04:07,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:04:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:04:07,538 INFO L87 Difference]: Start difference. First operand 265 states and 391 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:09,071 INFO L93 Difference]: Finished difference Result 334 states and 491 transitions. [2022-02-15 02:04:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:04:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 02:04:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:09,072 INFO L225 Difference]: With dead ends: 334 [2022-02-15 02:04:09,072 INFO L226 Difference]: Without dead ends: 328 [2022-02-15 02:04:09,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1858, Invalid=3112, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:04:09,072 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:09,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 21 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-15 02:04:09,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 205. [2022-02-15 02:04:09,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.485) internal successors, (297), 200 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2022-02-15 02:04:09,467 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 76 [2022-02-15 02:04:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:09,467 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2022-02-15 02:04:09,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:09,468 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2022-02-15 02:04:09,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:09,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:09,468 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:09,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529 [2022-02-15 02:04:09,468 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:09,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1598211070, now seen corresponding path program 528 times [2022-02-15 02:04:09,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:09,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716705865] [2022-02-15 02:04:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:09,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:09,469 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:09,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:09,470 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:09,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:09,908 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:09,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716705865] [2022-02-15 02:04:09,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1716705865] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:09,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:09,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:09,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662639548] [2022-02-15 02:04:09,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:09,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:09,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:09,910 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:11,159 INFO L93 Difference]: Finished difference Result 220 states and 321 transitions. [2022-02-15 02:04:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:11,159 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:11,160 INFO L225 Difference]: With dead ends: 220 [2022-02-15 02:04:11,160 INFO L226 Difference]: Without dead ends: 214 [2022-02-15 02:04:11,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:11,160 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:11,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 23 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:11,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-15 02:04:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2022-02-15 02:04:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.4852941176470589) internal successors, (303), 204 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2022-02-15 02:04:11,554 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 78 [2022-02-15 02:04:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:11,554 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2022-02-15 02:04:11,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2022-02-15 02:04:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:11,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:11,555 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:11,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530 [2022-02-15 02:04:11,555 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:11,555 INFO L85 PathProgramCache]: Analyzing trace with hash 503262078, now seen corresponding path program 529 times [2022-02-15 02:04:11,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:11,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880378524] [2022-02-15 02:04:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:11,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:11,556 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:11,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:11,557 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:11,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:12,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:12,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880378524] [2022-02-15 02:04:12,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880378524] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:12,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:12,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:12,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318795173] [2022-02-15 02:04:12,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:12,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:12,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:12,003 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:13,251 INFO L93 Difference]: Finished difference Result 224 states and 326 transitions. [2022-02-15 02:04:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:13,251 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:13,252 INFO L225 Difference]: With dead ends: 224 [2022-02-15 02:04:13,252 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 02:04:13,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:13,252 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:13,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:13,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 02:04:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2022-02-15 02:04:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-02-15 02:04:13,672 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 78 [2022-02-15 02:04:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:13,672 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-02-15 02:04:13,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-02-15 02:04:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:13,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:13,672 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:13,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable531 [2022-02-15 02:04:13,672 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash 524268286, now seen corresponding path program 530 times [2022-02-15 02:04:13,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:13,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394391015] [2022-02-15 02:04:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:13,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:13,674 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:13,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:13,674 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:14,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:14,117 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:14,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394391015] [2022-02-15 02:04:14,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394391015] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:14,117 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:14,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:14,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036760741] [2022-02-15 02:04:14,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:14,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:14,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:14,118 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:15,381 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 02:04:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:15,381 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:15,381 INFO L225 Difference]: With dead ends: 230 [2022-02-15 02:04:15,381 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 02:04:15,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:15,382 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:15,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 02:04:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 215. [2022-02-15 02:04:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-15 02:04:15,803 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 78 [2022-02-15 02:04:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:15,804 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-15 02:04:15,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-15 02:04:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:15,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:15,804 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:15,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable532 [2022-02-15 02:04:15,804 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -763602306, now seen corresponding path program 531 times [2022-02-15 02:04:15,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:15,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49758824] [2022-02-15 02:04:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:15,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:15,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:15,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:15,806 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:16,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:16,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:16,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49758824] [2022-02-15 02:04:16,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [49758824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:16,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:16,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:16,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797818187] [2022-02-15 02:04:16,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:16,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:16,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:16,247 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:17,520 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 02:04:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:17,521 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:17,521 INFO L225 Difference]: With dead ends: 236 [2022-02-15 02:04:17,521 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 02:04:17,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:17,521 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:17,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 23 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 02:04:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 217. [2022-02-15 02:04:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.4858490566037736) internal successors, (315), 212 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2022-02-15 02:04:17,953 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 78 [2022-02-15 02:04:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:17,953 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2022-02-15 02:04:17,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2022-02-15 02:04:17,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:17,955 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:17,955 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:17,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533 [2022-02-15 02:04:17,955 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:17,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1456659970, now seen corresponding path program 532 times [2022-02-15 02:04:17,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:17,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549556597] [2022-02-15 02:04:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:17,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:17,956 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:17,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:17,957 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:18,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:18,392 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:18,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549556597] [2022-02-15 02:04:18,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [549556597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:18,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:18,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:18,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929809967] [2022-02-15 02:04:18,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:18,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:18,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:18,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:18,393 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:19,697 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 02:04:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:19,697 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:19,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:19,698 INFO L225 Difference]: With dead ends: 242 [2022-02-15 02:04:19,698 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 02:04:19,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:19,698 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:19,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 23 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:19,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 02:04:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 219. [2022-02-15 02:04:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-15 02:04:20,143 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 78 [2022-02-15 02:04:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:20,143 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-15 02:04:20,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-15 02:04:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:20,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:20,144 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:20,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534 [2022-02-15 02:04:20,144 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1765144194, now seen corresponding path program 533 times [2022-02-15 02:04:20,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:20,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210703518] [2022-02-15 02:04:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:20,145 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:20,145 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:20,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:20,145 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:20,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:20,583 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:20,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210703518] [2022-02-15 02:04:20,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210703518] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:20,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:20,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:20,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502674098] [2022-02-15 02:04:20,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:20,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:20,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:20,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:20,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:20,584 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:21,926 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 02:04:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:21,927 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:21,927 INFO L225 Difference]: With dead ends: 248 [2022-02-15 02:04:21,927 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 02:04:21,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:21,928 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:21,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 02:04:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 221. [2022-02-15 02:04:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-15 02:04:22,380 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 78 [2022-02-15 02:04:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:22,380 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-15 02:04:22,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-15 02:04:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:22,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:22,380 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:22,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535 [2022-02-15 02:04:22,381 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:22,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1865740034, now seen corresponding path program 534 times [2022-02-15 02:04:22,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:22,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901255171] [2022-02-15 02:04:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:22,382 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:22,382 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:22,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:22,382 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:22,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:22,821 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:22,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901255171] [2022-02-15 02:04:22,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [901255171] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:22,822 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:22,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:22,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811933393] [2022-02-15 02:04:22,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:22,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:22,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:22,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:22,822 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:24,195 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 02:04:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:24,195 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:24,196 INFO L225 Difference]: With dead ends: 254 [2022-02-15 02:04:24,196 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 02:04:24,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:24,196 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:24,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 23 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:24,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 02:04:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 223. [2022-02-15 02:04:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-15 02:04:24,655 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 78 [2022-02-15 02:04:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:24,655 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-15 02:04:24,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-15 02:04:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:24,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:24,656 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:24,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536 [2022-02-15 02:04:24,656 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash 245905534, now seen corresponding path program 535 times [2022-02-15 02:04:24,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:24,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829462595] [2022-02-15 02:04:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:24,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:24,657 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:24,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:24,658 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:25,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:25,120 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:25,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829462595] [2022-02-15 02:04:25,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [829462595] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:25,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:25,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:25,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200201331] [2022-02-15 02:04:25,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:25,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:25,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:25,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:25,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:25,124 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:26,502 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 02:04:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:26,502 INFO L225 Difference]: With dead ends: 260 [2022-02-15 02:04:26,502 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 02:04:26,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:26,503 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:26,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 02:04:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 225. [2022-02-15 02:04:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-15 02:04:26,970 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 78 [2022-02-15 02:04:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:26,970 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-15 02:04:26,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-15 02:04:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:26,970 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:26,971 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:26,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537 [2022-02-15 02:04:26,971 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1982234626, now seen corresponding path program 536 times [2022-02-15 02:04:26,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:26,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441457691] [2022-02-15 02:04:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:26,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:26,972 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:26,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:26,972 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:27,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:27,410 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:27,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441457691] [2022-02-15 02:04:27,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1441457691] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:27,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:27,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:27,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870910078] [2022-02-15 02:04:27,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:27,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:27,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:27,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:27,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:27,411 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:28,812 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 02:04:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:28,812 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:28,813 INFO L225 Difference]: With dead ends: 266 [2022-02-15 02:04:28,813 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 02:04:28,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:28,813 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:28,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 02:04:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 227. [2022-02-15 02:04:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-15 02:04:29,289 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 78 [2022-02-15 02:04:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:29,289 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-15 02:04:29,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-15 02:04:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:29,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:29,290 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:29,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538 [2022-02-15 02:04:29,290 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:29,290 INFO L85 PathProgramCache]: Analyzing trace with hash -36247682, now seen corresponding path program 537 times [2022-02-15 02:04:29,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:29,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125132922] [2022-02-15 02:04:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:29,291 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:29,291 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:29,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:29,291 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:29,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:29,730 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:29,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125132922] [2022-02-15 02:04:29,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125132922] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:29,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:29,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:29,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176393931] [2022-02-15 02:04:29,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:29,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:29,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:29,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:29,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:29,731 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:31,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:31,163 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 02:04:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:31,163 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:31,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:31,163 INFO L225 Difference]: With dead ends: 272 [2022-02-15 02:04:31,163 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 02:04:31,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:31,164 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:31,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 02:04:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 229. [2022-02-15 02:04:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-15 02:04:31,654 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 78 [2022-02-15 02:04:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:31,654 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-15 02:04:31,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-15 02:04:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:31,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:31,655 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:31,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539 [2022-02-15 02:04:31,655 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1746431742, now seen corresponding path program 538 times [2022-02-15 02:04:31,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:31,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627292240] [2022-02-15 02:04:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:31,656 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:31,656 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:31,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:31,657 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:32,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:32,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:32,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627292240] [2022-02-15 02:04:32,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627292240] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:32,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:32,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:32,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686418996] [2022-02-15 02:04:32,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:32,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:32,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:32,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:32,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:32,096 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:33,550 INFO L93 Difference]: Finished difference Result 278 states and 407 transitions. [2022-02-15 02:04:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:33,551 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:33,551 INFO L225 Difference]: With dead ends: 278 [2022-02-15 02:04:33,551 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 02:04:33,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:33,551 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:33,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 15 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 02:04:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 231. [2022-02-15 02:04:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-15 02:04:34,063 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 78 [2022-02-15 02:04:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:34,063 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-15 02:04:34,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-15 02:04:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:34,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:34,064 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:34,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540 [2022-02-15 02:04:34,064 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1209407102, now seen corresponding path program 539 times [2022-02-15 02:04:34,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:34,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388960124] [2022-02-15 02:04:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:34,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:34,065 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:34,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:34,065 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:34,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:34,503 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:34,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388960124] [2022-02-15 02:04:34,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388960124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:34,503 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:34,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:34,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343720085] [2022-02-15 02:04:34,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:34,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:34,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:34,504 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:35,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:35,983 INFO L93 Difference]: Finished difference Result 284 states and 416 transitions. [2022-02-15 02:04:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:35,983 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:35,983 INFO L225 Difference]: With dead ends: 284 [2022-02-15 02:04:35,983 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 02:04:35,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:35,984 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:35,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 02:04:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 233. [2022-02-15 02:04:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-15 02:04:36,485 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 78 [2022-02-15 02:04:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:36,485 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-15 02:04:36,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-15 02:04:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:36,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:36,486 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:36,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541 [2022-02-15 02:04:36,486 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:36,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:36,486 INFO L85 PathProgramCache]: Analyzing trace with hash 524803582, now seen corresponding path program 540 times [2022-02-15 02:04:36,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:36,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677943852] [2022-02-15 02:04:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:36,487 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:36,487 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:36,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:36,487 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:36,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:36,927 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:36,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677943852] [2022-02-15 02:04:36,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [677943852] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:36,927 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:36,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:36,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675621998] [2022-02-15 02:04:36,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:36,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:36,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:36,928 INFO L87 Difference]: Start difference. First operand 233 states and 343 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:38,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:38,418 INFO L93 Difference]: Finished difference Result 290 states and 425 transitions. [2022-02-15 02:04:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:38,418 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:38,419 INFO L225 Difference]: With dead ends: 290 [2022-02-15 02:04:38,419 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 02:04:38,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:38,419 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:38,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:38,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 02:04:38,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 235. [2022-02-15 02:04:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4869565217391305) internal successors, (342), 230 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 346 transitions. [2022-02-15 02:04:38,930 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 346 transitions. Word has length 78 [2022-02-15 02:04:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:38,931 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 346 transitions. [2022-02-15 02:04:38,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 346 transitions. [2022-02-15 02:04:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:38,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:38,931 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:38,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542 [2022-02-15 02:04:38,931 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:38,931 INFO L85 PathProgramCache]: Analyzing trace with hash -249182850, now seen corresponding path program 541 times [2022-02-15 02:04:38,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:38,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643739293] [2022-02-15 02:04:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:38,932 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:38,932 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:38,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:38,933 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:39,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:39,372 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:39,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643739293] [2022-02-15 02:04:39,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [643739293] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:39,373 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:39,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:39,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593004706] [2022-02-15 02:04:39,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:39,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:39,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:39,374 INFO L87 Difference]: Start difference. First operand 235 states and 346 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:40,895 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-02-15 02:04:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:40,895 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:40,896 INFO L225 Difference]: With dead ends: 296 [2022-02-15 02:04:40,896 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 02:04:40,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:40,896 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:40,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 02:04:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 237. [2022-02-15 02:04:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2022-02-15 02:04:41,407 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 78 [2022-02-15 02:04:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:41,407 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2022-02-15 02:04:41,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2022-02-15 02:04:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:41,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:41,408 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:41,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543 [2022-02-15 02:04:41,408 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1020801794, now seen corresponding path program 542 times [2022-02-15 02:04:41,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:41,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127936713] [2022-02-15 02:04:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:41,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:41,409 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:41,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:41,409 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:41,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:41,851 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:41,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127936713] [2022-02-15 02:04:41,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [127936713] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:41,852 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:41,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:41,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409446317] [2022-02-15 02:04:41,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:41,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:41,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:41,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:41,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:41,853 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:43,402 INFO L93 Difference]: Finished difference Result 302 states and 443 transitions. [2022-02-15 02:04:43,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:43,403 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:43,403 INFO L225 Difference]: With dead ends: 302 [2022-02-15 02:04:43,403 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 02:04:43,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:43,404 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:43,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 29 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:43,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 02:04:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 239. [2022-02-15 02:04:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.4871794871794872) internal successors, (348), 234 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 352 transitions. [2022-02-15 02:04:43,936 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 352 transitions. Word has length 78 [2022-02-15 02:04:43,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:43,936 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 352 transitions. [2022-02-15 02:04:43,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:43,936 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 352 transitions. [2022-02-15 02:04:43,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:43,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:43,936 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:43,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544 [2022-02-15 02:04:43,936 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash 482735230, now seen corresponding path program 543 times [2022-02-15 02:04:43,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:43,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930797832] [2022-02-15 02:04:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:43,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:43,938 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:43,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:43,938 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:44,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:44,376 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:44,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930797832] [2022-02-15 02:04:44,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [930797832] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:44,376 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:44,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:44,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307411584] [2022-02-15 02:04:44,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:44,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:44,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:44,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:44,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:44,377 INFO L87 Difference]: Start difference. First operand 239 states and 352 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:45,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:45,949 INFO L93 Difference]: Finished difference Result 308 states and 452 transitions. [2022-02-15 02:04:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:45,949 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:45,949 INFO L225 Difference]: With dead ends: 308 [2022-02-15 02:04:45,950 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 02:04:45,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:45,950 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:45,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 29 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 02:04:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 241. [2022-02-15 02:04:46,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 236 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2022-02-15 02:04:46,485 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 78 [2022-02-15 02:04:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:46,485 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2022-02-15 02:04:46,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2022-02-15 02:04:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:46,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:46,486 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:46,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545 [2022-02-15 02:04:46,486 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2022163458, now seen corresponding path program 544 times [2022-02-15 02:04:46,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:46,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893628908] [2022-02-15 02:04:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:46,487 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:46,487 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:46,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:46,487 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:46,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:46,925 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:46,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893628908] [2022-02-15 02:04:46,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1893628908] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:46,926 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:46,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:46,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235825619] [2022-02-15 02:04:46,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:46,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:46,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:46,926 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:48,511 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2022-02-15 02:04:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:48,512 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:48,512 INFO L225 Difference]: With dead ends: 314 [2022-02-15 02:04:48,512 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 02:04:48,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:48,513 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:48,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 23 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 02:04:49,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 243. [2022-02-15 02:04:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.4873949579831933) internal successors, (354), 238 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-02-15 02:04:49,049 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 78 [2022-02-15 02:04:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:49,049 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-02-15 02:04:49,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-02-15 02:04:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:49,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:49,050 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:49,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546 [2022-02-15 02:04:49,050 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash 246850430, now seen corresponding path program 545 times [2022-02-15 02:04:49,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:49,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583936240] [2022-02-15 02:04:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:49,051 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:49,051 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:49,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:49,051 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:49,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:49,489 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:49,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583936240] [2022-02-15 02:04:49,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583936240] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:49,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:49,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:49,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661338017] [2022-02-15 02:04:49,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:49,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:49,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:49,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:49,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:49,490 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:51,125 INFO L93 Difference]: Finished difference Result 320 states and 470 transitions. [2022-02-15 02:04:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:51,126 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:51,126 INFO L225 Difference]: With dead ends: 320 [2022-02-15 02:04:51,126 INFO L226 Difference]: Without dead ends: 314 [2022-02-15 02:04:51,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:51,127 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:51,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-15 02:04:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 245. [2022-02-15 02:04:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.4875) internal successors, (357), 240 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 361 transitions. [2022-02-15 02:04:51,691 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 361 transitions. Word has length 78 [2022-02-15 02:04:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:51,691 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 361 transitions. [2022-02-15 02:04:51,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 361 transitions. [2022-02-15 02:04:51,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:51,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:51,692 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:51,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547 [2022-02-15 02:04:51,692 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1074189570, now seen corresponding path program 546 times [2022-02-15 02:04:51,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:51,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458409217] [2022-02-15 02:04:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:51,693 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:51,693 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:51,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:51,694 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:52,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:52,136 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:52,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458409217] [2022-02-15 02:04:52,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1458409217] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:52,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:52,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:52,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272648152] [2022-02-15 02:04:52,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:52,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:52,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:52,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:52,137 INFO L87 Difference]: Start difference. First operand 245 states and 361 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:53,800 INFO L93 Difference]: Finished difference Result 326 states and 479 transitions. [2022-02-15 02:04:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:53,801 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:53,801 INFO L225 Difference]: With dead ends: 326 [2022-02-15 02:04:53,801 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 02:04:53,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:53,802 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:53,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 02:04:54,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 247. [2022-02-15 02:04:54,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.487603305785124) internal successors, (360), 242 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 364 transitions. [2022-02-15 02:04:54,370 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 364 transitions. Word has length 78 [2022-02-15 02:04:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:54,370 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 364 transitions. [2022-02-15 02:04:54,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 364 transitions. [2022-02-15 02:04:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:54,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:54,371 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:54,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548 [2022-02-15 02:04:54,371 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash 716690046, now seen corresponding path program 547 times [2022-02-15 02:04:54,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:54,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183925901] [2022-02-15 02:04:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:54,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:54,372 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:54,373 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:54,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:54,826 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:54,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183925901] [2022-02-15 02:04:54,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [183925901] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:54,827 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:54,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:54,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054852851] [2022-02-15 02:04:54,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:54,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:54,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:54,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:54,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:54,827 INFO L87 Difference]: Start difference. First operand 247 states and 364 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:56,526 INFO L93 Difference]: Finished difference Result 332 states and 488 transitions. [2022-02-15 02:04:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:56,527 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:56,527 INFO L225 Difference]: With dead ends: 332 [2022-02-15 02:04:56,527 INFO L226 Difference]: Without dead ends: 326 [2022-02-15 02:04:56,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:56,528 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:56,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-15 02:04:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 249. [2022-02-15 02:04:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.4877049180327868) internal successors, (363), 244 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 367 transitions. [2022-02-15 02:04:57,111 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 367 transitions. Word has length 78 [2022-02-15 02:04:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:57,111 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 367 transitions. [2022-02-15 02:04:57,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 367 transitions. [2022-02-15 02:04:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:57,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:57,112 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:57,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549 [2022-02-15 02:04:57,112 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash -529884674, now seen corresponding path program 548 times [2022-02-15 02:04:57,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:57,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090899275] [2022-02-15 02:04:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:57,113 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:57,113 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:57,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:57,113 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:57,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:57,566 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:57,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090899275] [2022-02-15 02:04:57,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1090899275] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:57,566 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:57,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:04:57,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976343995] [2022-02-15 02:04:57,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:57,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:04:57,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:04:57,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:04:57,567 INFO L87 Difference]: Start difference. First operand 249 states and 367 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:59,312 INFO L93 Difference]: Finished difference Result 338 states and 497 transitions. [2022-02-15 02:04:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:04:59,312 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:04:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:59,313 INFO L225 Difference]: With dead ends: 338 [2022-02-15 02:04:59,313 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 02:04:59,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:04:59,313 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:59,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 31 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 02:04:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 251. [2022-02-15 02:04:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.4878048780487805) internal successors, (366), 246 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 370 transitions. [2022-02-15 02:04:59,923 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 370 transitions. Word has length 78 [2022-02-15 02:04:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:59,923 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 370 transitions. [2022-02-15 02:04:59,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 370 transitions. [2022-02-15 02:04:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:04:59,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:59,924 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:59,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550 [2022-02-15 02:04:59,924 INFO L402 AbstractCegarLoop]: === Iteration 552 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:59,924 INFO L85 PathProgramCache]: Analyzing trace with hash -192315010, now seen corresponding path program 549 times [2022-02-15 02:04:59,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:59,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258950018] [2022-02-15 02:04:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:59,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:04:59,925 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:04:59,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:59,926 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:00,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:00,381 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:00,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258950018] [2022-02-15 02:05:00,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [258950018] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:00,381 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:00,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:00,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766357534] [2022-02-15 02:05:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:00,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:00,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:00,382 INFO L87 Difference]: Start difference. First operand 251 states and 370 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:02,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:02,189 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-15 02:05:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:02,190 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:02,190 INFO L225 Difference]: With dead ends: 344 [2022-02-15 02:05:02,190 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 02:05:02,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:02,190 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:02,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 02:05:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 253. [2022-02-15 02:05:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.4879032258064515) internal successors, (369), 248 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 373 transitions. [2022-02-15 02:05:02,825 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 373 transitions. Word has length 78 [2022-02-15 02:05:02,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:02,825 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 373 transitions. [2022-02-15 02:05:02,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 373 transitions. [2022-02-15 02:05:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:02,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:02,826 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:02,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551 [2022-02-15 02:05:02,826 INFO L402 AbstractCegarLoop]: === Iteration 553 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:02,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2089584894, now seen corresponding path program 550 times [2022-02-15 02:05:02,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:02,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2547712] [2022-02-15 02:05:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:02,827 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:02,827 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:02,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:02,828 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:03,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:03,292 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:03,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2547712] [2022-02-15 02:05:03,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2547712] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:03,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:03,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:03,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665697696] [2022-02-15 02:05:03,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:03,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:03,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:03,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:03,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:03,293 INFO L87 Difference]: Start difference. First operand 253 states and 373 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:05,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:05,118 INFO L93 Difference]: Finished difference Result 350 states and 515 transitions. [2022-02-15 02:05:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:05,119 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:05,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:05,119 INFO L225 Difference]: With dead ends: 350 [2022-02-15 02:05:05,119 INFO L226 Difference]: Without dead ends: 344 [2022-02-15 02:05:05,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:05,120 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:05,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-15 02:05:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 255. [2022-02-15 02:05:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.488) internal successors, (372), 250 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 376 transitions. [2022-02-15 02:05:05,755 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 376 transitions. Word has length 78 [2022-02-15 02:05:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:05,756 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 376 transitions. [2022-02-15 02:05:05,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 376 transitions. [2022-02-15 02:05:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:05,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:05,756 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:05,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552 [2022-02-15 02:05:05,756 INFO L402 AbstractCegarLoop]: === Iteration 554 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash 267104382, now seen corresponding path program 551 times [2022-02-15 02:05:05,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:05,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007488652] [2022-02-15 02:05:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:05,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:05,757 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:05,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:05,758 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:06,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:06,218 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:06,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007488652] [2022-02-15 02:05:06,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007488652] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:06,219 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:06,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:06,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596608408] [2022-02-15 02:05:06,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:06,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:06,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:06,220 INFO L87 Difference]: Start difference. First operand 255 states and 376 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:08,067 INFO L93 Difference]: Finished difference Result 356 states and 524 transitions. [2022-02-15 02:05:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:08,068 INFO L225 Difference]: With dead ends: 356 [2022-02-15 02:05:08,068 INFO L226 Difference]: Without dead ends: 350 [2022-02-15 02:05:08,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:08,068 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:08,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 27 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:08,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-15 02:05:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 257. [2022-02-15 02:05:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 379 transitions. [2022-02-15 02:05:08,724 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 379 transitions. Word has length 78 [2022-02-15 02:05:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:08,725 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 379 transitions. [2022-02-15 02:05:08,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 379 transitions. [2022-02-15 02:05:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:08,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:08,725 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:08,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553 [2022-02-15 02:05:08,725 INFO L402 AbstractCegarLoop]: === Iteration 555 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:08,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1209989118, now seen corresponding path program 552 times [2022-02-15 02:05:08,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:08,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326528268] [2022-02-15 02:05:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:08,726 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:08,726 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:08,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:08,727 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:09,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:09,188 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:09,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326528268] [2022-02-15 02:05:09,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326528268] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:09,188 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:09,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:09,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854574120] [2022-02-15 02:05:09,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:09,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:09,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:09,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:09,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:09,189 INFO L87 Difference]: Start difference. First operand 257 states and 379 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:11,056 INFO L93 Difference]: Finished difference Result 362 states and 533 transitions. [2022-02-15 02:05:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:11,056 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:11,057 INFO L225 Difference]: With dead ends: 362 [2022-02-15 02:05:11,057 INFO L226 Difference]: Without dead ends: 356 [2022-02-15 02:05:11,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:11,057 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:11,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 27 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-15 02:05:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 259. [2022-02-15 02:05:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.4881889763779528) internal successors, (378), 254 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 382 transitions. [2022-02-15 02:05:11,693 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 382 transitions. Word has length 78 [2022-02-15 02:05:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:11,693 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 382 transitions. [2022-02-15 02:05:11,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 382 transitions. [2022-02-15 02:05:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:11,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:11,694 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:11,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable554 [2022-02-15 02:05:11,694 INFO L402 AbstractCegarLoop]: === Iteration 556 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1084120958, now seen corresponding path program 553 times [2022-02-15 02:05:11,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:11,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169584921] [2022-02-15 02:05:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:11,695 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:11,695 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:11,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:11,695 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:12,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:12,153 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:12,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169584921] [2022-02-15 02:05:12,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [169584921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:12,153 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:12,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:12,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255691101] [2022-02-15 02:05:12,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:12,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:12,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:12,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:12,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:12,154 INFO L87 Difference]: Start difference. First operand 259 states and 382 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:14,054 INFO L93 Difference]: Finished difference Result 368 states and 542 transitions. [2022-02-15 02:05:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:14,055 INFO L225 Difference]: With dead ends: 368 [2022-02-15 02:05:14,055 INFO L226 Difference]: Without dead ends: 362 [2022-02-15 02:05:14,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:14,056 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:14,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-15 02:05:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 261. [2022-02-15 02:05:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.48828125) internal successors, (381), 256 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 385 transitions. [2022-02-15 02:05:14,681 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 385 transitions. Word has length 78 [2022-02-15 02:05:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:14,682 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 385 transitions. [2022-02-15 02:05:14,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 385 transitions. [2022-02-15 02:05:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:14,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:14,682 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:14,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555 [2022-02-15 02:05:14,682 INFO L402 AbstractCegarLoop]: === Iteration 557 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:14,682 INFO L85 PathProgramCache]: Analyzing trace with hash 383903486, now seen corresponding path program 554 times [2022-02-15 02:05:14,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:14,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349878141] [2022-02-15 02:05:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:14,683 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:14,683 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:14,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:14,684 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:15,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:15,141 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:15,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349878141] [2022-02-15 02:05:15,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1349878141] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:15,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:15,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:15,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542959874] [2022-02-15 02:05:15,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:15,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:15,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:15,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:15,142 INFO L87 Difference]: Start difference. First operand 261 states and 385 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:17,040 INFO L93 Difference]: Finished difference Result 374 states and 551 transitions. [2022-02-15 02:05:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:17,040 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:17,040 INFO L225 Difference]: With dead ends: 374 [2022-02-15 02:05:17,040 INFO L226 Difference]: Without dead ends: 368 [2022-02-15 02:05:17,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:17,041 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:17,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 19 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-15 02:05:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 263. [2022-02-15 02:05:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.4883720930232558) internal successors, (384), 258 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 388 transitions. [2022-02-15 02:05:17,692 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 388 transitions. Word has length 78 [2022-02-15 02:05:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:17,692 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 388 transitions. [2022-02-15 02:05:17,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 388 transitions. [2022-02-15 02:05:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:17,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:17,693 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:17,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556 [2022-02-15 02:05:17,693 INFO L402 AbstractCegarLoop]: === Iteration 558 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:17,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1784778366, now seen corresponding path program 555 times [2022-02-15 02:05:17,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:17,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506284214] [2022-02-15 02:05:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:17,694 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:17,694 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:17,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:17,695 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:18,146 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:18,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506284214] [2022-02-15 02:05:18,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [506284214] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:18,147 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:18,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:18,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136704493] [2022-02-15 02:05:18,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:18,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:18,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:18,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:18,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:18,148 INFO L87 Difference]: Start difference. First operand 263 states and 388 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:20,035 INFO L93 Difference]: Finished difference Result 380 states and 560 transitions. [2022-02-15 02:05:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:20,036 INFO L225 Difference]: With dead ends: 380 [2022-02-15 02:05:20,036 INFO L226 Difference]: Without dead ends: 374 [2022-02-15 02:05:20,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:20,037 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:20,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-15 02:05:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 265. [2022-02-15 02:05:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.4884615384615385) internal successors, (387), 260 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 391 transitions. [2022-02-15 02:05:20,670 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 391 transitions. Word has length 78 [2022-02-15 02:05:20,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:20,670 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 391 transitions. [2022-02-15 02:05:20,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 391 transitions. [2022-02-15 02:05:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:20,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:20,671 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:20,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557 [2022-02-15 02:05:20,671 INFO L402 AbstractCegarLoop]: === Iteration 559 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash -594192898, now seen corresponding path program 556 times [2022-02-15 02:05:20,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:20,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529068924] [2022-02-15 02:05:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:20,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:20,672 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:20,672 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:21,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:21,136 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:21,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529068924] [2022-02-15 02:05:21,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [529068924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:21,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:21,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:21,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760131963] [2022-02-15 02:05:21,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:21,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:21,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:21,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:21,137 INFO L87 Difference]: Start difference. First operand 265 states and 391 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:23,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:23,045 INFO L93 Difference]: Finished difference Result 386 states and 569 transitions. [2022-02-15 02:05:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:23,046 INFO L225 Difference]: With dead ends: 386 [2022-02-15 02:05:23,046 INFO L226 Difference]: Without dead ends: 380 [2022-02-15 02:05:23,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:23,046 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:23,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 21 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-15 02:05:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 267. [2022-02-15 02:05:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.4885496183206106) internal successors, (390), 262 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 394 transitions. [2022-02-15 02:05:23,705 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 394 transitions. Word has length 78 [2022-02-15 02:05:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:23,705 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 394 transitions. [2022-02-15 02:05:23,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 394 transitions. [2022-02-15 02:05:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:23,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:23,705 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:23,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable558 [2022-02-15 02:05:23,705 INFO L402 AbstractCegarLoop]: === Iteration 560 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:23,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:23,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1862976130, now seen corresponding path program 557 times [2022-02-15 02:05:23,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:23,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934390320] [2022-02-15 02:05:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:23,707 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:23,707 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:23,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:23,707 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:24,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:24,160 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:24,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934390320] [2022-02-15 02:05:24,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1934390320] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:24,160 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:24,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:24,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672765989] [2022-02-15 02:05:24,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:24,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:24,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:24,161 INFO L87 Difference]: Start difference. First operand 267 states and 394 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:26,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:26,034 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-02-15 02:05:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:26,035 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:26,035 INFO L225 Difference]: With dead ends: 392 [2022-02-15 02:05:26,035 INFO L226 Difference]: Without dead ends: 386 [2022-02-15 02:05:26,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:26,036 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:26,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 29 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-15 02:05:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 269. [2022-02-15 02:05:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.4886363636363635) internal successors, (393), 264 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 397 transitions. [2022-02-15 02:05:26,694 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 397 transitions. Word has length 78 [2022-02-15 02:05:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:26,694 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 397 transitions. [2022-02-15 02:05:26,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:26,695 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 397 transitions. [2022-02-15 02:05:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:26,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:26,695 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:26,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559 [2022-02-15 02:05:26,695 INFO L402 AbstractCegarLoop]: === Iteration 561 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:26,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1392950018, now seen corresponding path program 558 times [2022-02-15 02:05:26,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:26,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63528445] [2022-02-15 02:05:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:26,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:26,696 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:26,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:26,697 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:27,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:27,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:27,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63528445] [2022-02-15 02:05:27,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [63528445] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:27,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:27,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:27,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559081669] [2022-02-15 02:05:27,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:27,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:27,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:27,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:27,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:27,149 INFO L87 Difference]: Start difference. First operand 269 states and 397 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:29,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:29,034 INFO L93 Difference]: Finished difference Result 398 states and 587 transitions. [2022-02-15 02:05:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:29,035 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:29,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:29,035 INFO L225 Difference]: With dead ends: 398 [2022-02-15 02:05:29,035 INFO L226 Difference]: Without dead ends: 392 [2022-02-15 02:05:29,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:29,036 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:29,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-15 02:05:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 271. [2022-02-15 02:05:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.4887218045112782) internal successors, (396), 266 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 400 transitions. [2022-02-15 02:05:29,687 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 400 transitions. Word has length 78 [2022-02-15 02:05:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:29,687 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 400 transitions. [2022-02-15 02:05:29,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 400 transitions. [2022-02-15 02:05:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:29,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:29,687 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:29,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560 [2022-02-15 02:05:29,687 INFO L402 AbstractCegarLoop]: === Iteration 562 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash -669422466, now seen corresponding path program 559 times [2022-02-15 02:05:29,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:29,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833136226] [2022-02-15 02:05:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:29,688 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:29,689 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:29,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:29,689 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:30,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:30,139 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:30,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833136226] [2022-02-15 02:05:30,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [833136226] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:30,139 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:30,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:30,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713901706] [2022-02-15 02:05:30,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:30,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:30,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:30,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:30,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:30,140 INFO L87 Difference]: Start difference. First operand 271 states and 400 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:32,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:32,048 INFO L93 Difference]: Finished difference Result 404 states and 596 transitions. [2022-02-15 02:05:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:32,049 INFO L225 Difference]: With dead ends: 404 [2022-02-15 02:05:32,049 INFO L226 Difference]: Without dead ends: 398 [2022-02-15 02:05:32,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:32,049 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:32,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 23 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-15 02:05:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 273. [2022-02-15 02:05:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.4888059701492538) internal successors, (399), 268 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 403 transitions. [2022-02-15 02:05:32,731 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 403 transitions. Word has length 78 [2022-02-15 02:05:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:32,732 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 403 transitions. [2022-02-15 02:05:32,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 403 transitions. [2022-02-15 02:05:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:05:32,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:32,732 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:32,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561 [2022-02-15 02:05:32,732 INFO L402 AbstractCegarLoop]: === Iteration 563 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1144146946, now seen corresponding path program 560 times [2022-02-15 02:05:32,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:32,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360002064] [2022-02-15 02:05:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:32,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:32,733 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:32,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:32,734 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:33,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:33,190 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:33,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360002064] [2022-02-15 02:05:33,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360002064] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:33,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:33,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:33,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103476794] [2022-02-15 02:05:33,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:33,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:33,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:33,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:33,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:33,191 INFO L87 Difference]: Start difference. First operand 273 states and 403 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:34,903 INFO L93 Difference]: Finished difference Result 344 states and 506 transitions. [2022-02-15 02:05:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:34,903 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:05:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:34,903 INFO L225 Difference]: With dead ends: 344 [2022-02-15 02:05:34,903 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 02:05:34,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1965, Invalid=3291, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:34,904 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:34,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 27 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 02:05:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 211. [2022-02-15 02:05:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.4854368932038835) internal successors, (306), 206 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 310 transitions. [2022-02-15 02:05:35,351 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 310 transitions. Word has length 78 [2022-02-15 02:05:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:35,351 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 310 transitions. [2022-02-15 02:05:35,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 310 transitions. [2022-02-15 02:05:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:05:35,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:35,352 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:35,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562 [2022-02-15 02:05:35,352 INFO L402 AbstractCegarLoop]: === Iteration 564 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash 21347809, now seen corresponding path program 561 times [2022-02-15 02:05:35,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:35,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202377981] [2022-02-15 02:05:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:35,353 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:35,353 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:35,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:35,354 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:35,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:35,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202377981] [2022-02-15 02:05:35,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [202377981] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:35,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:35,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:05:35,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821107595] [2022-02-15 02:05:35,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:35,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:05:35,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:05:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:05:35,832 INFO L87 Difference]: Start difference. First operand 211 states and 310 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:37,202 INFO L93 Difference]: Finished difference Result 226 states and 330 transitions. [2022-02-15 02:05:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:05:37,203 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 02:05:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:37,203 INFO L225 Difference]: With dead ends: 226 [2022-02-15 02:05:37,203 INFO L226 Difference]: Without dead ends: 220 [2022-02-15 02:05:37,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:05:37,204 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:37,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 19 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-15 02:05:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 215. [2022-02-15 02:05:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.4857142857142858) internal successors, (312), 210 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2022-02-15 02:05:37,660 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 80 [2022-02-15 02:05:37,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:37,660 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2022-02-15 02:05:37,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:37,660 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2022-02-15 02:05:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:05:37,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:37,661 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:37,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563 [2022-02-15 02:05:37,661 INFO L402 AbstractCegarLoop]: === Iteration 565 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1073601183, now seen corresponding path program 562 times [2022-02-15 02:05:37,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:37,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729389821] [2022-02-15 02:05:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:37,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:37,662 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:37,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:37,663 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:38,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:38,139 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:38,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729389821] [2022-02-15 02:05:38,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1729389821] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:38,139 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:38,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:05:38,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719363954] [2022-02-15 02:05:38,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:38,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:05:38,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:05:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:05:38,140 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:39,528 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2022-02-15 02:05:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:05:39,528 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 02:05:39,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:39,529 INFO L225 Difference]: With dead ends: 230 [2022-02-15 02:05:39,529 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 02:05:39,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:05:39,529 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:39,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 25 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 02:05:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 219. [2022-02-15 02:05:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 322 transitions. [2022-02-15 02:05:40,004 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 322 transitions. Word has length 80 [2022-02-15 02:05:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:40,004 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 322 transitions. [2022-02-15 02:05:40,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 322 transitions. [2022-02-15 02:05:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:05:40,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:40,005 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:40,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564 [2022-02-15 02:05:40,005 INFO L402 AbstractCegarLoop]: === Iteration 566 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:40,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1052594975, now seen corresponding path program 563 times [2022-02-15 02:05:40,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:40,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263568220] [2022-02-15 02:05:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:40,006 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:40,006 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:40,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:40,007 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:40,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:40,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:40,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263568220] [2022-02-15 02:05:40,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [263568220] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:40,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:40,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:05:40,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188692743] [2022-02-15 02:05:40,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:40,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:05:40,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:40,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:05:40,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:05:40,491 INFO L87 Difference]: Start difference. First operand 219 states and 322 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:41,895 INFO L93 Difference]: Finished difference Result 236 states and 344 transitions. [2022-02-15 02:05:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:05:41,895 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 02:05:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:41,895 INFO L225 Difference]: With dead ends: 236 [2022-02-15 02:05:41,895 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 02:05:41,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:05:41,896 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:41,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 21 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 02:05:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2022-02-15 02:05:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.4861111111111112) internal successors, (321), 216 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-02-15 02:05:42,386 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 80 [2022-02-15 02:05:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:42,386 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-02-15 02:05:42,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-02-15 02:05:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:05:42,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:42,387 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:42,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable565 [2022-02-15 02:05:42,387 INFO L402 AbstractCegarLoop]: === Iteration 567 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:42,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:42,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1954501729, now seen corresponding path program 564 times [2022-02-15 02:05:42,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:42,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560959176] [2022-02-15 02:05:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:42,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:42,388 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:42,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:42,389 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:42,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:42,868 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:42,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560959176] [2022-02-15 02:05:42,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [560959176] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:42,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:42,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:05:42,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517114074] [2022-02-15 02:05:42,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:42,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:05:42,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:05:42,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:05:42,869 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:44,292 INFO L93 Difference]: Finished difference Result 242 states and 353 transitions. [2022-02-15 02:05:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:05:44,292 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 02:05:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:44,293 INFO L225 Difference]: With dead ends: 242 [2022-02-15 02:05:44,293 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 02:05:44,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:05:44,293 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:44,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 29 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 02:05:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 223. [2022-02-15 02:05:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 218 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 328 transitions. [2022-02-15 02:05:44,789 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 328 transitions. Word has length 80 [2022-02-15 02:05:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:44,789 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 328 transitions. [2022-02-15 02:05:44,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 328 transitions. [2022-02-15 02:05:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:05:44,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:44,789 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:44,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566 [2022-02-15 02:05:44,790 INFO L402 AbstractCegarLoop]: === Iteration 568 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:44,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:44,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1261444065, now seen corresponding path program 565 times [2022-02-15 02:05:44,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:44,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036757042] [2022-02-15 02:05:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:44,791 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:44,791 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:44,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:44,791 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:45,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:45,271 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:45,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036757042] [2022-02-15 02:05:45,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1036757042] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:45,271 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:45,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:05:45,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913576084] [2022-02-15 02:05:45,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:45,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:05:45,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:45,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:05:45,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:05:45,272 INFO L87 Difference]: Start difference. First operand 223 states and 328 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:46,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:46,720 INFO L93 Difference]: Finished difference Result 248 states and 362 transitions. [2022-02-15 02:05:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:05:46,720 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 02:05:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:46,720 INFO L225 Difference]: With dead ends: 248 [2022-02-15 02:05:46,721 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 02:05:46,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:05:46,721 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:46,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 21 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 02:05:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 225. [2022-02-15 02:05:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 331 transitions. [2022-02-15 02:05:47,234 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 331 transitions. Word has length 80 [2022-02-15 02:05:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:47,234 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 331 transitions. [2022-02-15 02:05:47,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 331 transitions. [2022-02-15 02:05:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:05:47,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:47,235 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:47,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567 [2022-02-15 02:05:47,235 INFO L402 AbstractCegarLoop]: === Iteration 569 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:47,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:47,235 INFO L85 PathProgramCache]: Analyzing trace with hash 952959841, now seen corresponding path program 566 times [2022-02-15 02:05:47,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:47,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594854492] [2022-02-15 02:05:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:47,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:47,236 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:47,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:47,237 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:47,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:47,716 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:47,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594854492] [2022-02-15 02:05:47,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1594854492] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:47,716 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:47,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:05:47,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493641970] [2022-02-15 02:05:47,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:47,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:05:47,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:05:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:05:47,717 INFO L87 Difference]: Start difference. First operand 225 states and 331 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:49,182 INFO L93 Difference]: Finished difference Result 254 states and 371 transitions. [2022-02-15 02:05:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:05:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 02:05:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:49,183 INFO L225 Difference]: With dead ends: 254 [2022-02-15 02:05:49,183 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 02:05:49,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:05:49,183 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:49,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 17 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 02:05:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 227. [2022-02-15 02:05:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 334 transitions. [2022-02-15 02:05:49,692 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 334 transitions. Word has length 80 [2022-02-15 02:05:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:49,692 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 334 transitions. [2022-02-15 02:05:49,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 334 transitions. [2022-02-15 02:05:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:05:49,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:49,693 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:49,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568 [2022-02-15 02:05:49,693 INFO L402 AbstractCegarLoop]: === Iteration 570 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash 852364001, now seen corresponding path program 567 times [2022-02-15 02:05:49,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:49,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602227155] [2022-02-15 02:05:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:49,694 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:49,694 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:49,694 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:50,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:50,168 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:50,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602227155] [2022-02-15 02:05:50,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [602227155] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:50,168 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:50,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:05:50,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175860711] [2022-02-15 02:05:50,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:50,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:05:50,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:05:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:05:50,169 INFO L87 Difference]: Start difference. First operand 227 states and 334 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:51,670 INFO L93 Difference]: Finished difference Result 260 states and 380 transitions. [2022-02-15 02:05:51,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:05:51,671 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 02:05:51,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:51,671 INFO L225 Difference]: With dead ends: 260 [2022-02-15 02:05:51,671 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 02:05:51,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:05:51,672 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:51,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 29 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 02:05:52,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 229. [2022-02-15 02:05:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2022-02-15 02:05:52,192 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 80 [2022-02-15 02:05:52,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:52,192 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2022-02-15 02:05:52,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2022-02-15 02:05:52,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:05:52,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:52,192 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:52,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569 [2022-02-15 02:05:52,192 INFO L402 AbstractCegarLoop]: === Iteration 571 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:52,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1330957727, now seen corresponding path program 568 times [2022-02-15 02:05:52,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:52,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570802589] [2022-02-15 02:05:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:52,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:52,194 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:52,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:52,194 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:52,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:52,681 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:52,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570802589] [2022-02-15 02:05:52,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570802589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:52,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:52,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:05:52,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233200468] [2022-02-15 02:05:52,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:52,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:05:52,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:52,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:05:52,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:05:52,682 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:54,184 INFO L93 Difference]: Finished difference Result 266 states and 389 transitions. [2022-02-15 02:05:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:05:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 02:05:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:54,185 INFO L225 Difference]: With dead ends: 266 [2022-02-15 02:05:54,185 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 02:05:54,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:05:54,185 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:54,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 17 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 02:05:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 231. [2022-02-15 02:05:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.4867256637168142) internal successors, (336), 226 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 340 transitions. [2022-02-15 02:05:54,721 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 340 transitions. Word has length 80 [2022-02-15 02:05:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:54,722 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 340 transitions. [2022-02-15 02:05:54,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 340 transitions. [2022-02-15 02:05:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:05:54,722 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:54,722 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:54,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570 [2022-02-15 02:05:54,722 INFO L402 AbstractCegarLoop]: === Iteration 572 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:54,722 INFO L85 PathProgramCache]: Analyzing trace with hash 735869409, now seen corresponding path program 569 times [2022-02-15 02:05:54,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:54,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772144745] [2022-02-15 02:05:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:54,723 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:54,723 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:54,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:54,724 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:55,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:55,204 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:55,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772144745] [2022-02-15 02:05:55,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1772144745] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:55,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:55,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:05:55,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212041571] [2022-02-15 02:05:55,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:55,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:05:55,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:55,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:05:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:05:55,205 INFO L87 Difference]: Start difference. First operand 231 states and 340 transitions. Second operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:56,743 INFO L93 Difference]: Finished difference Result 272 states and 398 transitions. [2022-02-15 02:05:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:05:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 02:05:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:56,744 INFO L225 Difference]: With dead ends: 272 [2022-02-15 02:05:56,744 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 02:05:56,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=3475, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:05:56,744 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:56,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 25 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:05:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 02:05:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 233. [2022-02-15 02:05:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.486842105263158) internal successors, (339), 228 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 343 transitions. [2022-02-15 02:05:57,280 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 343 transitions. Word has length 80 [2022-02-15 02:05:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:57,280 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 343 transitions. [2022-02-15 02:05:57,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 343 transitions. [2022-02-15 02:05:57,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:05:57,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:57,281 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:57,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571 [2022-02-15 02:05:57,281 INFO L402 AbstractCegarLoop]: === Iteration 573 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:57,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1613110943, now seen corresponding path program 570 times [2022-02-15 02:05:57,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:57,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713757244] [2022-02-15 02:05:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:57,282 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 02:05:57,282 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 02:05:57,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:57,283 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:05:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat