/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/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:13:24,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:13:24,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:13:24,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:13:24,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:13:24,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:13:24,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:13:24,457 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 01:13:24,464 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:13:24,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:13:24,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:13:24,466 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:13:24,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:13:24,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:13:24,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:13:24,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:13:24,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:13:24,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:13:24,467 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:13:24,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:13:24,467 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:13:24,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:13:24,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:13:24,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:13:24,468 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:13:24,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:13:24,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:13:24,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:13:24,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:13:24,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:13:24,469 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:13:24,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:13:24,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:13:24,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:13:24,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:13:24,685 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:13:24,686 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:13:24,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-02-15 01:13:24,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31deb5c9f/4ebcbfec48144b8496defcba27f09314/FLAG0f0b3b860 [2022-02-15 01:13:25,133 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:13:25,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-02-15 01:13:25,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31deb5c9f/4ebcbfec48144b8496defcba27f09314/FLAG0f0b3b860 [2022-02-15 01:13:25,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31deb5c9f/4ebcbfec48144b8496defcba27f09314 [2022-02-15 01:13:25,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:13:25,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:13:25,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:13:25,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:13:25,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:13:25,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69af64c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25, skipping insertion in model container [2022-02-15 01:13:25,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:13:25,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:13:25,351 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/vogal-1.i[895,908] [2022-02-15 01:13:25,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:13:25,404 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:13:25,413 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/vogal-1.i[895,908] [2022-02-15 01:13:25,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:13:25,432 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:13:25,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25 WrapperNode [2022-02-15 01:13:25,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:13:25,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:13:25,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:13:25,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:13:25,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:13:25,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:13:25,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:13:25,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:13:25,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25" (1/1) ... [2022-02-15 01:13:25,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:13:25,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:13:25,493 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 01:13:25,495 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 01:13:25,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:13:25,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:13:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:13:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 01:13:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:13:25,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:13:25,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:13:25,526 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:13:25,526 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:13:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:13:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:13:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:13:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 01:13:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:13:25,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 01:13:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:13:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 01:13:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:13:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:13:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:13:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:13:25,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:13:25,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:13:25,623 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:13:25,624 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:13:25,830 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:13:25,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:13:25,835 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-15 01:13:25,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:13:25 BoogieIcfgContainer [2022-02-15 01:13:25,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:13:25,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:13:25,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:13:25,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:13:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:13:25" (1/3) ... [2022-02-15 01:13:25,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773655d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:13:25, skipping insertion in model container [2022-02-15 01:13:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:25" (2/3) ... [2022-02-15 01:13:25,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773655d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:13:25, skipping insertion in model container [2022-02-15 01:13:25,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:13:25" (3/3) ... [2022-02-15 01:13:25,852 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-02-15 01:13:25,856 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:13:25,856 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:13:25,888 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:13:25,894 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 01:13:25,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:13:25,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 01:13:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 01:13:25,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:25,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:25,913 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:25,918 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 1 times [2022-02-15 01:13:25,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:25,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367636072] [2022-02-15 01:13:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:25,974 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:26,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:26,118 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:26,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367636072] [2022-02-15 01:13:26,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1367636072] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:26,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:26,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:13:26,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131824078] [2022-02-15 01:13:26,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:26,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:13:26,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:26,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:13:26,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:13:26,158 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:26,212 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-02-15 01:13:26,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:13:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have 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 01:13:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:26,224 INFO L225 Difference]: With dead ends: 66 [2022-02-15 01:13:26,225 INFO L226 Difference]: Without dead ends: 30 [2022-02-15 01:13:26,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:13:26,232 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:26,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:13:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-15 01:13:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-15 01:13:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 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 01:13:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-02-15 01:13:26,272 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-02-15 01:13:26,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:26,273 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-02-15 01:13:26,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-02-15 01:13:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:13:26,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:26,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:26,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:13:26,276 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:26,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:26,277 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 1 times [2022-02-15 01:13:26,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:26,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516857169] [2022-02-15 01:13:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:26,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:26,287 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:26,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:26,400 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 01:13:26,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:26,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516857169] [2022-02-15 01:13:26,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [516857169] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:26,402 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:26,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:13:26,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656115964] [2022-02-15 01:13:26,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:26,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:13:26,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:26,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:13:26,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:13:26,404 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:26,531 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-02-15 01:13:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:13:26,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have 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 01:13:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:26,536 INFO L225 Difference]: With dead ends: 67 [2022-02-15 01:13:26,536 INFO L226 Difference]: Without dead ends: 45 [2022-02-15 01:13:26,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:13:26,541 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:26,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:26,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-15 01:13:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-02-15 01:13:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 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 01:13:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-02-15 01:13:26,555 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-02-15 01:13:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:26,556 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-02-15 01:13:26,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-02-15 01:13:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:13:26,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:26,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:26,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:13:26,562 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 1 times [2022-02-15 01:13:26,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:26,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130099596] [2022-02-15 01:13:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:26,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:26,586 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:26,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:26,589 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:26,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:26,744 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:26,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130099596] [2022-02-15 01:13:26,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [130099596] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:26,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:26,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:13:26,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178201242] [2022-02-15 01:13:26,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:26,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:13:26,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:13:26,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:13:26,748 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:26,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:26,940 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2022-02-15 01:13:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:13:26,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have 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 01:13:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:26,943 INFO L225 Difference]: With dead ends: 82 [2022-02-15 01:13:26,943 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 01:13:26,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:26,951 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:26,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:26,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 01:13:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2022-02-15 01:13:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 01:13:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-02-15 01:13:26,976 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2022-02-15 01:13:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:26,976 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-02-15 01:13:26,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-02-15 01:13:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 01:13:26,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:26,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:26,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:13:26,978 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:26,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2027956876, now seen corresponding path program 2 times [2022-02-15 01:13:26,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:26,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615461665] [2022-02-15 01:13:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:26,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:26,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:26,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:26,992 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,120 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 01:13:27,120 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:27,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615461665] [2022-02-15 01:13:27,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [615461665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:27,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:27,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:13:27,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194856021] [2022-02-15 01:13:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:27,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:13:27,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:13:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:13:27,122 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:27,282 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-02-15 01:13:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:13:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have 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 01:13:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:27,284 INFO L225 Difference]: With dead ends: 97 [2022-02-15 01:13:27,284 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 01:13:27,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:27,285 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:27,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 57 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 01:13:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 35. [2022-02-15 01:13:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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 01:13:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-02-15 01:13:27,296 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2022-02-15 01:13:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:27,296 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-02-15 01:13:27,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-02-15 01:13:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:13:27,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:27,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:27,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:13:27,298 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:27,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1706217130, now seen corresponding path program 3 times [2022-02-15 01:13:27,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:27,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832541990] [2022-02-15 01:13:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:27,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:27,301 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:27,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:27,303 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:27,387 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:27,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832541990] [2022-02-15 01:13:27,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [832541990] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:27,387 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:27,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:13:27,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430786335] [2022-02-15 01:13:27,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:27,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:13:27,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:27,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:13:27,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:27,389 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:27,659 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2022-02-15 01:13:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:13:27,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have 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 01:13:27,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:27,661 INFO L225 Difference]: With dead ends: 112 [2022-02-15 01:13:27,661 INFO L226 Difference]: Without dead ends: 90 [2022-02-15 01:13:27,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:13:27,662 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 193 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:27,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 64 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-15 01:13:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 37. [2022-02-15 01:13:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.25) internal successors, (40), 32 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 01:13:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-02-15 01:13:27,673 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2022-02-15 01:13:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:27,673 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-02-15 01:13:27,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-02-15 01:13:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:13:27,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:27,674 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:27,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:13:27,674 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1751966536, now seen corresponding path program 4 times [2022-02-15 01:13:27,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:27,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470147739] [2022-02-15 01:13:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:27,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:27,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:27,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:27,679 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:27,783 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:27,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470147739] [2022-02-15 01:13:27,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [470147739] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:27,784 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:27,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:13:27,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917993259] [2022-02-15 01:13:27,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:27,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:13:27,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:27,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:13:27,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:13:27,785 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:28,110 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-02-15 01:13:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:13:28,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have 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 01:13:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:28,116 INFO L225 Difference]: With dead ends: 127 [2022-02-15 01:13:28,116 INFO L226 Difference]: Without dead ends: 105 [2022-02-15 01:13:28,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:13:28,119 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 256 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:28,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 71 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-15 01:13:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 39. [2022-02-15 01:13:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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 01:13:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-02-15 01:13:28,137 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2022-02-15 01:13:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:28,138 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-02-15 01:13:28,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,138 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-02-15 01:13:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:13:28,139 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:28,139 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:28,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:13:28,139 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:28,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:28,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1527494554, now seen corresponding path program 5 times [2022-02-15 01:13:28,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:28,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199573923] [2022-02-15 01:13:28,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:28,142 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:28,142 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:28,143 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:28,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:28,281 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 01:13:28,282 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:28,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199573923] [2022-02-15 01:13:28,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199573923] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:28,282 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:28,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:13:28,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480501184] [2022-02-15 01:13:28,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:28,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:13:28,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:28,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:13:28,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:28,284 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:28,422 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-02-15 01:13:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:13:28,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have 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 01:13:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:28,424 INFO L225 Difference]: With dead ends: 63 [2022-02-15 01:13:28,424 INFO L226 Difference]: Without dead ends: 58 [2022-02-15 01:13:28,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:13:28,425 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:28,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:28,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-15 01:13:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-02-15 01:13:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-02-15 01:13:28,454 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 30 [2022-02-15 01:13:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:28,455 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-02-15 01:13:28,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-02-15 01:13:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:13:28,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:28,456 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:28,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:13:28,456 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:28,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash 810905395, now seen corresponding path program 1 times [2022-02-15 01:13:28,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:28,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570443566] [2022-02-15 01:13:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:28,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:28,459 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:28,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:28,460 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:28,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:28,535 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 01:13:28,535 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:28,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570443566] [2022-02-15 01:13:28,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [570443566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:28,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:28,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:13:28,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215310380] [2022-02-15 01:13:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:28,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:13:28,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:13:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:13:28,537 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:28,640 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2022-02-15 01:13:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:13:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:13:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:28,641 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:13:28,641 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 01:13:28,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:28,642 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:28,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 01:13:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-02-15 01:13:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2022-02-15 01:13:28,667 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 36 [2022-02-15 01:13:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:28,667 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2022-02-15 01:13:28,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2022-02-15 01:13:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 01:13:28,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:28,668 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:28,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:13:28,669 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1464313968, now seen corresponding path program 2 times [2022-02-15 01:13:28,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:28,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784714908] [2022-02-15 01:13:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:28,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:28,672 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:28,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:28,673 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:28,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:28,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:28,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784714908] [2022-02-15 01:13:28,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784714908] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:28,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:28,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:13:28,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071924337] [2022-02-15 01:13:28,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:28,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:13:28,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:28,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:13:28,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:13:28,784 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:28,867 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2022-02-15 01:13:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:13:28,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-15 01:13:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:28,868 INFO L225 Difference]: With dead ends: 138 [2022-02-15 01:13:28,868 INFO L226 Difference]: Without dead ends: 93 [2022-02-15 01:13:28,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:13:28,871 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:28,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 41 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:13:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-15 01:13:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-02-15 01:13:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 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 01:13:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-02-15 01:13:28,898 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 39 [2022-02-15 01:13:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:28,900 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-02-15 01:13:28,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-02-15 01:13:28,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:13:28,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:28,904 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:28,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:13:28,905 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:28,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2131958580, now seen corresponding path program 1 times [2022-02-15 01:13:28,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:28,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601161857] [2022-02-15 01:13:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:28,908 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:28,908 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:28,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:28,910 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:29,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:29,468 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 01:13:29,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:29,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601161857] [2022-02-15 01:13:29,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [601161857] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:29,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:29,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:13:29,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849423032] [2022-02-15 01:13:29,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:29,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:13:29,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:13:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:29,470 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:29,834 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-02-15 01:13:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:13:29,835 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:13:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:29,835 INFO L225 Difference]: With dead ends: 90 [2022-02-15 01:13:29,835 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 01:13:29,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:13:29,836 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 61 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:29,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 01:13:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-02-15 01:13:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 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 01:13:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-02-15 01:13:29,864 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-02-15 01:13:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:29,865 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-02-15 01:13:29,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-02-15 01:13:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:13:29,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:29,866 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:29,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:13:29,867 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1769981706, now seen corresponding path program 1 times [2022-02-15 01:13:29,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:29,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232293364] [2022-02-15 01:13:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:29,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:29,870 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:29,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:29,872 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:30,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:30,286 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:30,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232293364] [2022-02-15 01:13:30,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232293364] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:30,286 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:30,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:13:30,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564976213] [2022-02-15 01:13:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:30,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:13:30,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:30,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:13:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:13:30,288 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:30,498 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-02-15 01:13:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:13:30,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:13:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:30,500 INFO L225 Difference]: With dead ends: 105 [2022-02-15 01:13:30,500 INFO L226 Difference]: Without dead ends: 72 [2022-02-15 01:13:30,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:13:30,503 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:30,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 53 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-15 01:13:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-15 01:13:30,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 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 01:13:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-02-15 01:13:30,533 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 40 [2022-02-15 01:13:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:30,533 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-02-15 01:13:30,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-02-15 01:13:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:13:30,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:30,534 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:30,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:13:30,534 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:30,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2076492661, now seen corresponding path program 1 times [2022-02-15 01:13:30,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:30,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718742572] [2022-02-15 01:13:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:30,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:30,537 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:30,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:30,538 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:30,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:30,970 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:30,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718742572] [2022-02-15 01:13:30,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [718742572] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:30,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:30,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:13:30,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922646403] [2022-02-15 01:13:30,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:30,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:13:30,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:30,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:13:30,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:13:30,972 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:31,399 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2022-02-15 01:13:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:13:31,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 01:13:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:31,400 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:13:31,401 INFO L226 Difference]: Without dead ends: 76 [2022-02-15 01:13:31,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:13:31,401 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 93 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:31,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 50 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-15 01:13:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-02-15 01:13:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 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 01:13:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2022-02-15 01:13:31,426 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 41 [2022-02-15 01:13:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:31,426 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2022-02-15 01:13:31,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2022-02-15 01:13:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:13:31,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:31,427 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:31,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:13:31,428 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:31,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1960309197, now seen corresponding path program 1 times [2022-02-15 01:13:31,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:31,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017017955] [2022-02-15 01:13:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:31,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:31,430 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:31,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:31,432 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,599 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 01:13:31,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:31,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017017955] [2022-02-15 01:13:31,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017017955] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:31,600 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:31,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:13:31,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533735820] [2022-02-15 01:13:31,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:31,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:13:31,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:13:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:31,601 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:31,815 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2022-02-15 01:13:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:13:31,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 01:13:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:31,817 INFO L225 Difference]: With dead ends: 120 [2022-02-15 01:13:31,817 INFO L226 Difference]: Without dead ends: 115 [2022-02-15 01:13:31,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:13:31,818 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 96 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:31,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 42 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-15 01:13:31,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2022-02-15 01:13:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2022-02-15 01:13:31,847 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 41 [2022-02-15 01:13:31,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:31,847 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2022-02-15 01:13:31,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2022-02-15 01:13:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:13:31,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:31,848 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:31,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:13:31,848 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:31,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:31,849 INFO L85 PathProgramCache]: Analyzing trace with hash -727315291, now seen corresponding path program 1 times [2022-02-15 01:13:31,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:31,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640157384] [2022-02-15 01:13:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:31,851 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:31,852 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:31,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:31,853 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,950 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 01:13:31,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:31,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640157384] [2022-02-15 01:13:31,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [640157384] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:31,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:31,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:13:31,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528766434] [2022-02-15 01:13:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:31,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:13:31,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:31,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:13:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:31,951 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:32,245 INFO L93 Difference]: Finished difference Result 284 states and 362 transitions. [2022-02-15 01:13:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:13:32,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:13:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:32,247 INFO L225 Difference]: With dead ends: 284 [2022-02-15 01:13:32,247 INFO L226 Difference]: Without dead ends: 255 [2022-02-15 01:13:32,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:13:32,248 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 129 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:32,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 62 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:32,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-15 01:13:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 83. [2022-02-15 01:13:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 78 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-02-15 01:13:32,278 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 42 [2022-02-15 01:13:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:32,279 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-02-15 01:13:32,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-02-15 01:13:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:13:32,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:32,279 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:13:32,280 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:32,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1280661403, now seen corresponding path program 2 times [2022-02-15 01:13:32,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:32,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217254714] [2022-02-15 01:13:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:32,282 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:32,282 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:32,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:32,284 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:32,389 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:32,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217254714] [2022-02-15 01:13:32,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1217254714] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:32,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:32,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:13:32,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214679381] [2022-02-15 01:13:32,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:32,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:13:32,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:13:32,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:13:32,391 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:32,781 INFO L93 Difference]: Finished difference Result 301 states and 383 transitions. [2022-02-15 01:13:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:13:32,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-15 01:13:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:32,783 INFO L225 Difference]: With dead ends: 301 [2022-02-15 01:13:32,783 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 01:13:32,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:13:32,784 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:32,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 100 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 01:13:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 85. [2022-02-15 01:13:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-02-15 01:13:32,818 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 46 [2022-02-15 01:13:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:32,818 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-02-15 01:13:32,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-02-15 01:13:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:13:32,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:32,819 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:32,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:13:32,819 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1482276086, now seen corresponding path program 3 times [2022-02-15 01:13:32,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:32,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439917428] [2022-02-15 01:13:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:32,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:32,822 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:32,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:32,823 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:32,930 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 01:13:32,930 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:32,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439917428] [2022-02-15 01:13:32,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1439917428] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:32,930 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:32,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:13:32,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878215491] [2022-02-15 01:13:32,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:32,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:13:32,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:32,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:13:32,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:13:32,932 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:33,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:33,545 INFO L93 Difference]: Finished difference Result 443 states and 569 transitions. [2022-02-15 01:13:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:13:33,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:13:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:33,548 INFO L225 Difference]: With dead ends: 443 [2022-02-15 01:13:33,548 INFO L226 Difference]: Without dead ends: 414 [2022-02-15 01:13:33,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:13:33,549 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 276 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:33,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 112 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:13:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-02-15 01:13:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 89. [2022-02-15 01:13:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 84 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2022-02-15 01:13:33,577 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 48 [2022-02-15 01:13:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:33,578 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2022-02-15 01:13:33,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:33,578 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2022-02-15 01:13:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:13:33,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:33,578 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:33,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:13:33,579 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:33,579 INFO L85 PathProgramCache]: Analyzing trace with hash -145264029, now seen corresponding path program 1 times [2022-02-15 01:13:33,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:33,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447752323] [2022-02-15 01:13:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:33,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:33,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:33,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:33,582 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:33,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:33,706 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:33,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447752323] [2022-02-15 01:13:33,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447752323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:33,707 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:33,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:13:33,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911576013] [2022-02-15 01:13:33,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:33,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:13:33,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:33,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:13:33,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:33,708 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:34,055 INFO L93 Difference]: Finished difference Result 161 states and 201 transitions. [2022-02-15 01:13:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:13:34,055 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-15 01:13:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:34,057 INFO L225 Difference]: With dead ends: 161 [2022-02-15 01:13:34,057 INFO L226 Difference]: Without dead ends: 156 [2022-02-15 01:13:34,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:13:34,057 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:34,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 90 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-15 01:13:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2022-02-15 01:13:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 112 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2022-02-15 01:13:34,111 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 51 [2022-02-15 01:13:34,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:34,111 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2022-02-15 01:13:34,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2022-02-15 01:13:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:13:34,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:34,112 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:34,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:13:34,112 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 1 times [2022-02-15 01:13:34,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:34,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079740639] [2022-02-15 01:13:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:34,114 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:34,115 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:34,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:34,116 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:35,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:35,265 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:35,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079740639] [2022-02-15 01:13:35,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1079740639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:35,265 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:35,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:13:35,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160377294] [2022-02-15 01:13:35,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:35,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:13:35,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:13:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:13:35,266 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:35,982 INFO L93 Difference]: Finished difference Result 326 states and 417 transitions. [2022-02-15 01:13:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:13:35,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-15 01:13:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:35,983 INFO L225 Difference]: With dead ends: 326 [2022-02-15 01:13:35,983 INFO L226 Difference]: Without dead ends: 258 [2022-02-15 01:13:35,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:13:35,985 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 156 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:35,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 70 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:13:35,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-15 01:13:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 174. [2022-02-15 01:13:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 169 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 221 transitions. [2022-02-15 01:13:36,070 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 221 transitions. Word has length 51 [2022-02-15 01:13:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:36,070 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 221 transitions. [2022-02-15 01:13:36,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 221 transitions. [2022-02-15 01:13:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:13:36,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:36,071 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:36,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:13:36,072 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 2 times [2022-02-15 01:13:36,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:36,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600595205] [2022-02-15 01:13:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:36,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:36,074 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:36,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:36,075 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:37,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:37,365 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:37,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600595205] [2022-02-15 01:13:37,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [600595205] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:37,365 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:37,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:13:37,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665606350] [2022-02-15 01:13:37,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:37,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:13:37,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:37,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:13:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:13:37,367 INFO L87 Difference]: Start difference. First operand 174 states and 221 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:38,380 INFO L93 Difference]: Finished difference Result 380 states and 484 transitions. [2022-02-15 01:13:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:13:38,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-15 01:13:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:38,381 INFO L225 Difference]: With dead ends: 380 [2022-02-15 01:13:38,381 INFO L226 Difference]: Without dead ends: 291 [2022-02-15 01:13:38,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:13:38,382 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 179 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:38,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 72 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:13:38,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-15 01:13:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 210. [2022-02-15 01:13:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.278048780487805) internal successors, (262), 205 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 266 transitions. [2022-02-15 01:13:38,490 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 266 transitions. Word has length 51 [2022-02-15 01:13:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:38,491 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 266 transitions. [2022-02-15 01:13:38,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 266 transitions. [2022-02-15 01:13:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:13:38,492 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:38,492 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:38,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:13:38,492 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 1 times [2022-02-15 01:13:38,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:38,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606795311] [2022-02-15 01:13:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:38,494 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:38,495 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:38,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:38,496 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:39,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:39,520 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 01:13:39,520 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:39,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606795311] [2022-02-15 01:13:39,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1606795311] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:39,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:39,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:13:39,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449916486] [2022-02-15 01:13:39,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:39,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:13:39,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:39,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:13:39,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:13:39,522 INFO L87 Difference]: Start difference. First operand 210 states and 266 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:40,372 INFO L93 Difference]: Finished difference Result 368 states and 464 transitions. [2022-02-15 01:13:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:13:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-15 01:13:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:40,374 INFO L225 Difference]: With dead ends: 368 [2022-02-15 01:13:40,374 INFO L226 Difference]: Without dead ends: 309 [2022-02-15 01:13:40,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:13:40,375 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 157 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:40,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 54 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:13:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-15 01:13:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 227. [2022-02-15 01:13:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.2477477477477477) internal successors, (277), 222 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 281 transitions. [2022-02-15 01:13:40,472 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 281 transitions. Word has length 51 [2022-02-15 01:13:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:40,472 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 281 transitions. [2022-02-15 01:13:40,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 281 transitions. [2022-02-15 01:13:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:13:40,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:40,473 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:40,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:13:40,473 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:40,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:40,474 INFO L85 PathProgramCache]: Analyzing trace with hash -198494423, now seen corresponding path program 2 times [2022-02-15 01:13:40,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:40,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749541502] [2022-02-15 01:13:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:40,475 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:40,476 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:40,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:40,477 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:41,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:41,658 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:41,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749541502] [2022-02-15 01:13:41,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [749541502] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:41,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:41,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:13:41,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380633724] [2022-02-15 01:13:41,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:41,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:13:41,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:13:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:13:41,659 INFO L87 Difference]: Start difference. First operand 227 states and 281 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:42,655 INFO L93 Difference]: Finished difference Result 385 states and 477 transitions. [2022-02-15 01:13:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:13:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-15 01:13:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:42,657 INFO L225 Difference]: With dead ends: 385 [2022-02-15 01:13:42,657 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 01:13:42,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:13:42,658 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 198 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:42,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 66 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:13:42,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 01:13:42,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 207. [2022-02-15 01:13:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.2277227722772277) internal successors, (248), 202 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 252 transitions. [2022-02-15 01:13:42,757 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 252 transitions. Word has length 51 [2022-02-15 01:13:42,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:42,757 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 252 transitions. [2022-02-15 01:13:42,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:42,757 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 252 transitions. [2022-02-15 01:13:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:13:42,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:42,758 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:42,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:13:42,758 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1931900780, now seen corresponding path program 4 times [2022-02-15 01:13:42,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:42,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629697491] [2022-02-15 01:13:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:42,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:42,760 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:42,762 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:42,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:42,898 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:42,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629697491] [2022-02-15 01:13:42,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [629697491] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:42,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:42,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:13:42,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559340189] [2022-02-15 01:13:42,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:42,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:13:42,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:42,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:13:42,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:13:42,900 INFO L87 Difference]: Start difference. First operand 207 states and 252 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:44,080 INFO L93 Difference]: Finished difference Result 838 states and 1070 transitions. [2022-02-15 01:13:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:13:44,082 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:13:44,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:44,085 INFO L225 Difference]: With dead ends: 838 [2022-02-15 01:13:44,085 INFO L226 Difference]: Without dead ends: 809 [2022-02-15 01:13:44,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:13:44,086 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 326 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:44,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 165 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:13:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-02-15 01:13:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 211. [2022-02-15 01:13:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.233009708737864) internal successors, (254), 206 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 258 transitions. [2022-02-15 01:13:44,202 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 258 transitions. Word has length 52 [2022-02-15 01:13:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:44,202 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 258 transitions. [2022-02-15 01:13:44,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 258 transitions. [2022-02-15 01:13:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:13:44,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:44,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:44,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:13:44,203 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:44,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:44,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1617347862, now seen corresponding path program 3 times [2022-02-15 01:13:44,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:44,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169470421] [2022-02-15 01:13:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:44,205 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:44,205 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:44,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:44,206 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:44,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:44,303 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:44,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169470421] [2022-02-15 01:13:44,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [169470421] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:44,303 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:44,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:13:44,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897900424] [2022-02-15 01:13:44,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:44,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:13:44,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:13:44,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:44,304 INFO L87 Difference]: Start difference. First operand 211 states and 258 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:44,873 INFO L93 Difference]: Finished difference Result 493 states and 621 transitions. [2022-02-15 01:13:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:13:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:13:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:44,876 INFO L225 Difference]: With dead ends: 493 [2022-02-15 01:13:44,876 INFO L226 Difference]: Without dead ends: 445 [2022-02-15 01:13:44,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:13:44,877 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 192 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:44,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 69 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-02-15 01:13:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 234. [2022-02-15 01:13:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.240174672489083) internal successors, (284), 229 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 288 transitions. [2022-02-15 01:13:45,003 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 288 transitions. Word has length 53 [2022-02-15 01:13:45,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:45,003 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 288 transitions. [2022-02-15 01:13:45,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 288 transitions. [2022-02-15 01:13:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:13:45,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:45,005 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:45,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:13:45,005 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:45,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 2 times [2022-02-15 01:13:45,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:45,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056675873] [2022-02-15 01:13:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:45,007 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:45,007 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:45,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:45,008 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:45,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:45,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:45,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056675873] [2022-02-15 01:13:45,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1056675873] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:45,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:45,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:13:45,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320237329] [2022-02-15 01:13:45,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:45,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:13:45,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:45,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:13:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:13:45,087 INFO L87 Difference]: Start difference. First operand 234 states and 288 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:45,340 INFO L93 Difference]: Finished difference Result 396 states and 487 transitions. [2022-02-15 01:13:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:13:45,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:13:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:45,341 INFO L225 Difference]: With dead ends: 396 [2022-02-15 01:13:45,341 INFO L226 Difference]: Without dead ends: 233 [2022-02-15 01:13:45,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:13:45,342 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:45,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-02-15 01:13:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 214. [2022-02-15 01:13:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.167464114832536) internal successors, (244), 209 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 248 transitions. [2022-02-15 01:13:45,489 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 248 transitions. Word has length 54 [2022-02-15 01:13:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:45,489 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 248 transitions. [2022-02-15 01:13:45,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 248 transitions. [2022-02-15 01:13:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 01:13:45,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:45,490 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:45,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:13:45,491 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:45,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:45,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1965807313, now seen corresponding path program 4 times [2022-02-15 01:13:45,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:45,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399016758] [2022-02-15 01:13:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:45,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:45,493 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:45,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:45,494 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:45,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:45,610 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:45,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399016758] [2022-02-15 01:13:45,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399016758] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:45,611 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:45,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:13:45,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638121920] [2022-02-15 01:13:45,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:45,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:13:45,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:45,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:13:45,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:13:45,612 INFO L87 Difference]: Start difference. First operand 214 states and 248 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:46,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:46,407 INFO L93 Difference]: Finished difference Result 585 states and 693 transitions. [2022-02-15 01:13:46,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:13:46,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 01:13:46,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:46,409 INFO L225 Difference]: With dead ends: 585 [2022-02-15 01:13:46,409 INFO L226 Difference]: Without dead ends: 540 [2022-02-15 01:13:46,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:13:46,410 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 222 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:46,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 90 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:13:46,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-02-15 01:13:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 214. [2022-02-15 01:13:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.167464114832536) internal successors, (244), 209 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 248 transitions. [2022-02-15 01:13:46,544 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 248 transitions. Word has length 55 [2022-02-15 01:13:46,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:46,544 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 248 transitions. [2022-02-15 01:13:46,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 248 transitions. [2022-02-15 01:13:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:13:46,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:46,549 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:46,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:13:46,549 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:46,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:46,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1954216222, now seen corresponding path program 5 times [2022-02-15 01:13:46,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:46,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593691859] [2022-02-15 01:13:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:46,551 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:46,551 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:46,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:46,552 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:46,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:46,713 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:46,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593691859] [2022-02-15 01:13:46,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593691859] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:46,713 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:46,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:13:46,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002181797] [2022-02-15 01:13:46,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:46,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:13:46,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:13:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:13:46,715 INFO L87 Difference]: Start difference. First operand 214 states and 248 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:48,315 INFO L93 Difference]: Finished difference Result 1011 states and 1212 transitions. [2022-02-15 01:13:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:13:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:13:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:48,319 INFO L225 Difference]: With dead ends: 1011 [2022-02-15 01:13:48,319 INFO L226 Difference]: Without dead ends: 982 [2022-02-15 01:13:48,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:13:48,320 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 418 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:48,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 208 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:13:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-02-15 01:13:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 218. [2022-02-15 01:13:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.1737089201877935) internal successors, (250), 213 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2022-02-15 01:13:48,448 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 56 [2022-02-15 01:13:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:48,449 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2022-02-15 01:13:48,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2022-02-15 01:13:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 01:13:48,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:48,450 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:48,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:13:48,450 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:48,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:48,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1827890636, now seen corresponding path program 5 times [2022-02-15 01:13:48,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:48,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064515682] [2022-02-15 01:13:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:48,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:48,452 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:48,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:48,453 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:48,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:48,586 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 01:13:48,587 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:48,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064515682] [2022-02-15 01:13:48,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064515682] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:48,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:48,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:13:48,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336099953] [2022-02-15 01:13:48,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:48,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:13:48,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:48,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:13:48,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:13:48,588 INFO L87 Difference]: Start difference. First operand 218 states and 254 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:49,633 INFO L93 Difference]: Finished difference Result 684 states and 813 transitions. [2022-02-15 01:13:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:13:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-15 01:13:49,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:49,636 INFO L225 Difference]: With dead ends: 684 [2022-02-15 01:13:49,636 INFO L226 Difference]: Without dead ends: 639 [2022-02-15 01:13:49,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:13:49,637 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 239 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:49,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 119 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:13:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-15 01:13:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 218. [2022-02-15 01:13:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.1737089201877935) internal successors, (250), 213 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2022-02-15 01:13:49,773 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 57 [2022-02-15 01:13:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:49,773 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2022-02-15 01:13:49,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2022-02-15 01:13:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:13:49,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:49,773 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:49,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:13:49,774 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1861017081, now seen corresponding path program 6 times [2022-02-15 01:13:49,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:49,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254689013] [2022-02-15 01:13:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:49,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:49,775 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:49,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:49,776 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:49,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:49,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:49,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254689013] [2022-02-15 01:13:49,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [254689013] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:49,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:49,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:13:49,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88935214] [2022-02-15 01:13:49,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:49,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:13:49,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:13:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:13:49,930 INFO L87 Difference]: Start difference. First operand 218 states and 254 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:50,961 INFO L93 Difference]: Finished difference Result 779 states and 927 transitions. [2022-02-15 01:13:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:13:50,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:13:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:50,964 INFO L225 Difference]: With dead ends: 779 [2022-02-15 01:13:50,964 INFO L226 Difference]: Without dead ends: 734 [2022-02-15 01:13:50,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:13:50,965 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 283 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:50,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 141 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:13:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-02-15 01:13:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 218. [2022-02-15 01:13:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.1737089201877935) internal successors, (250), 213 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2022-02-15 01:13:51,099 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 59 [2022-02-15 01:13:51,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:51,099 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2022-02-15 01:13:51,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2022-02-15 01:13:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:13:51,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:51,100 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:51,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:13:51,100 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:51,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 3 times [2022-02-15 01:13:51,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:51,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243113719] [2022-02-15 01:13:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:51,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:51,102 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:51,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:51,104 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:51,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:51,201 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:51,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243113719] [2022-02-15 01:13:51,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [243113719] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:51,201 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:51,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:13:51,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526644166] [2022-02-15 01:13:51,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:51,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:13:51,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:13:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:13:51,202 INFO L87 Difference]: Start difference. First operand 218 states and 254 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:51,478 INFO L93 Difference]: Finished difference Result 304 states and 352 transitions. [2022-02-15 01:13:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:13:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:13:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:51,480 INFO L225 Difference]: With dead ends: 304 [2022-02-15 01:13:51,480 INFO L226 Difference]: Without dead ends: 228 [2022-02-15 01:13:51,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:13:51,485 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:51,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 52 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-15 01:13:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 182. [2022-02-15 01:13:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.1807909604519775) internal successors, (209), 177 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 213 transitions. [2022-02-15 01:13:51,583 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 213 transitions. Word has length 60 [2022-02-15 01:13:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:51,583 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 213 transitions. [2022-02-15 01:13:51,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 213 transitions. [2022-02-15 01:13:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:13:51,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:51,584 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:51,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:13:51,584 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash 713223000, now seen corresponding path program 6 times [2022-02-15 01:13:51,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:51,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229670556] [2022-02-15 01:13:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:51,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:51,586 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:51,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:51,588 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:51,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:51,811 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:51,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229670556] [2022-02-15 01:13:51,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [229670556] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:51,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:51,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:13:51,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452526890] [2022-02-15 01:13:51,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:51,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:13:51,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:13:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:13:51,813 INFO L87 Difference]: Start difference. First operand 182 states and 213 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:53,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:53,987 INFO L93 Difference]: Finished difference Result 1169 states and 1405 transitions. [2022-02-15 01:13:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:13:53,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:13:53,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:53,995 INFO L225 Difference]: With dead ends: 1169 [2022-02-15 01:13:53,995 INFO L226 Difference]: Without dead ends: 1140 [2022-02-15 01:13:53,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:13:53,996 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 500 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:53,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 256 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:13:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-02-15 01:13:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 186. [2022-02-15 01:13:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.1878453038674033) internal successors, (215), 181 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 219 transitions. [2022-02-15 01:13:54,114 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 219 transitions. Word has length 60 [2022-02-15 01:13:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:54,114 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 219 transitions. [2022-02-15 01:13:54,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 219 transitions. [2022-02-15 01:13:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:13:54,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:54,115 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:54,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:13:54,116 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 4 times [2022-02-15 01:13:54,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:54,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85295134] [2022-02-15 01:13:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:54,118 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:54,118 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:54,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:54,119 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:54,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:54,589 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:54,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85295134] [2022-02-15 01:13:54,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [85295134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:54,590 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:54,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:13:54,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115217213] [2022-02-15 01:13:54,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:54,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:13:54,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:54,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:13:54,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:13:54,591 INFO L87 Difference]: Start difference. First operand 186 states and 219 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:55,048 INFO L93 Difference]: Finished difference Result 222 states and 259 transitions. [2022-02-15 01:13:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:13:55,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 01:13:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:55,049 INFO L225 Difference]: With dead ends: 222 [2022-02-15 01:13:55,050 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:13:55,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:13:55,050 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 138 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:55,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 58 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:13:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:13:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-02-15 01:13:55,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 141 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:55,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 176 transitions. [2022-02-15 01:13:55,149 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 176 transitions. Word has length 61 [2022-02-15 01:13:55,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:55,149 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 176 transitions. [2022-02-15 01:13:55,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:55,150 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 176 transitions. [2022-02-15 01:13:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:13:55,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:55,150 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:55,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:13:55,151 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:55,151 INFO L85 PathProgramCache]: Analyzing trace with hash -741653378, now seen corresponding path program 7 times [2022-02-15 01:13:55,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:55,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355570545] [2022-02-15 01:13:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:55,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:55,153 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:55,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:55,154 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:55,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:55,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:55,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355570545] [2022-02-15 01:13:55,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [355570545] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:55,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:55,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:13:55,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786320432] [2022-02-15 01:13:55,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:55,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:13:55,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:55,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:13:55,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:13:55,323 INFO L87 Difference]: Start difference. First operand 146 states and 176 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:56,625 INFO L93 Difference]: Finished difference Result 775 states and 931 transitions. [2022-02-15 01:13:56,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:13:56,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 01:13:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:56,627 INFO L225 Difference]: With dead ends: 775 [2022-02-15 01:13:56,627 INFO L226 Difference]: Without dead ends: 730 [2022-02-15 01:13:56,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:13:56,628 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 278 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:56,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 146 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:13:56,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-02-15 01:13:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 146. [2022-02-15 01:13:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 141 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 176 transitions. [2022-02-15 01:13:56,750 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 176 transitions. Word has length 61 [2022-02-15 01:13:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:56,750 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 176 transitions. [2022-02-15 01:13:56,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 176 transitions. [2022-02-15 01:13:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:13:56,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:56,751 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:56,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:13:56,751 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:56,751 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 5 times [2022-02-15 01:13:56,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:56,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292144807] [2022-02-15 01:13:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:56,752 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:56,752 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:56,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:56,753 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:58,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:58,105 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:58,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292144807] [2022-02-15 01:13:58,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [292144807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:58,105 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:58,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:13:58,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924000981] [2022-02-15 01:13:58,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:58,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:13:58,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:13:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:13:58,106 INFO L87 Difference]: Start difference. First operand 146 states and 176 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:59,624 INFO L93 Difference]: Finished difference Result 385 states and 460 transitions. [2022-02-15 01:13:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:13:59,624 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:13:59,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:59,625 INFO L225 Difference]: With dead ends: 385 [2022-02-15 01:13:59,625 INFO L226 Difference]: Without dead ends: 352 [2022-02-15 01:13:59,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:13:59,626 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 259 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:59,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 59 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:13:59,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-15 01:13:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 182. [2022-02-15 01:13:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2033898305084745) internal successors, (213), 177 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 01:13:59,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 217 transitions. [2022-02-15 01:13:59,808 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 217 transitions. Word has length 62 [2022-02-15 01:13:59,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:59,809 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 217 transitions. [2022-02-15 01:13:59,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:59,809 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 217 transitions. [2022-02-15 01:13:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:13:59,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:59,809 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:59,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:13:59,810 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:59,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:59,810 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 6 times [2022-02-15 01:13:59,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:59,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749709634] [2022-02-15 01:13:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:59,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:59,811 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:59,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:59,812 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:00,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:00,876 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 01:14:00,877 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:00,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749709634] [2022-02-15 01:14:00,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [749709634] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:00,877 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:00,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:14:00,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205465101] [2022-02-15 01:14:00,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:00,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:14:00,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:00,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:14:00,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:14:00,878 INFO L87 Difference]: Start difference. First operand 182 states and 217 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:02,715 INFO L93 Difference]: Finished difference Result 508 states and 604 transitions. [2022-02-15 01:14:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:14:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have 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 01:14:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:02,718 INFO L225 Difference]: With dead ends: 508 [2022-02-15 01:14:02,718 INFO L226 Difference]: Without dead ends: 503 [2022-02-15 01:14:02,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:14:02,719 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 239 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:02,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 103 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:14:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-02-15 01:14:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 235. [2022-02-15 01:14:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.2130434782608697) internal successors, (279), 230 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 01:14:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2022-02-15 01:14:02,946 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 62 [2022-02-15 01:14:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:02,946 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2022-02-15 01:14:02,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2022-02-15 01:14:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:14:02,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:02,947 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:02,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:14:02,947 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1338068092, now seen corresponding path program 8 times [2022-02-15 01:14:02,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:02,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689311011] [2022-02-15 01:14:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:02,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:02,949 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:02,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:02,950 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:03,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:03,241 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:03,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689311011] [2022-02-15 01:14:03,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689311011] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:03,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:03,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:14:03,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310536179] [2022-02-15 01:14:03,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:03,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:14:03,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:03,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:14:03,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:14:03,243 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:03,815 INFO L93 Difference]: Finished difference Result 370 states and 440 transitions. [2022-02-15 01:14:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:14:03,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:14:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:03,816 INFO L225 Difference]: With dead ends: 370 [2022-02-15 01:14:03,816 INFO L226 Difference]: Without dead ends: 365 [2022-02-15 01:14:03,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:14:03,817 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:03,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 50 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:14:03,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-15 01:14:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 198. [2022-02-15 01:14:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.2072538860103628) internal successors, (233), 193 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 237 transitions. [2022-02-15 01:14:03,985 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 237 transitions. Word has length 62 [2022-02-15 01:14:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:03,985 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 237 transitions. [2022-02-15 01:14:03,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 237 transitions. [2022-02-15 01:14:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:14:03,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:03,986 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:03,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:14:03,987 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1517007984, now seen corresponding path program 7 times [2022-02-15 01:14:03,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:03,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99625541] [2022-02-15 01:14:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:03,988 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:03,988 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:03,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:03,989 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:04,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:04,128 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 01:14:04,129 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:04,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99625541] [2022-02-15 01:14:04,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [99625541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:04,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:04,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:14:04,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282358074] [2022-02-15 01:14:04,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:04,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:14:04,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:04,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:14:04,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:14:04,130 INFO L87 Difference]: Start difference. First operand 198 states and 237 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:04,919 INFO L93 Difference]: Finished difference Result 344 states and 408 transitions. [2022-02-15 01:14:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:14:04,920 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:14:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:04,921 INFO L225 Difference]: With dead ends: 344 [2022-02-15 01:14:04,921 INFO L226 Difference]: Without dead ends: 339 [2022-02-15 01:14:04,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:14:04,921 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 179 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:04,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 140 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:14:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-15 01:14:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 246. [2022-02-15 01:14:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-02-15 01:14:05,216 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 72 [2022-02-15 01:14:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:05,217 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-02-15 01:14:05,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-02-15 01:14:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:14:05,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:05,219 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:05,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:14:05,219 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:05,219 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 8 times [2022-02-15 01:14:05,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:05,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122365329] [2022-02-15 01:14:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:05,221 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:05,222 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:05,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:05,223 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:06,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:06,197 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 01:14:06,197 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:06,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122365329] [2022-02-15 01:14:06,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122365329] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:06,197 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:06,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:14:06,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735156833] [2022-02-15 01:14:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:06,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:14:06,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:14:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:14:06,199 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:07,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:07,199 INFO L93 Difference]: Finished difference Result 550 states and 652 transitions. [2022-02-15 01:14:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:14:07,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:14:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:07,201 INFO L225 Difference]: With dead ends: 550 [2022-02-15 01:14:07,201 INFO L226 Difference]: Without dead ends: 496 [2022-02-15 01:14:07,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:14:07,202 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 269 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:07,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 44 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:14:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-15 01:14:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 355. [2022-02-15 01:14:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.2028571428571428) internal successors, (421), 350 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:07,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 425 transitions. [2022-02-15 01:14:07,596 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 425 transitions. Word has length 72 [2022-02-15 01:14:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:07,596 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 425 transitions. [2022-02-15 01:14:07,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 425 transitions. [2022-02-15 01:14:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:14:07,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:07,597 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:07,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:14:07,597 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash -288430350, now seen corresponding path program 9 times [2022-02-15 01:14:07,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:07,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747154374] [2022-02-15 01:14:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:07,599 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:07,599 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:07,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:07,600 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:08,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:08,300 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 01:14:08,300 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:08,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747154374] [2022-02-15 01:14:08,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1747154374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:08,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:08,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:14:08,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134012356] [2022-02-15 01:14:08,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:08,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:14:08,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:08,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:14:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:14:08,302 INFO L87 Difference]: Start difference. First operand 355 states and 425 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:09,932 INFO L93 Difference]: Finished difference Result 1031 states and 1217 transitions. [2022-02-15 01:14:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:14:09,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:14:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:09,935 INFO L225 Difference]: With dead ends: 1031 [2022-02-15 01:14:09,935 INFO L226 Difference]: Without dead ends: 926 [2022-02-15 01:14:09,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:14:09,936 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 355 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:09,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 50 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:14:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-02-15 01:14:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 443. [2022-02-15 01:14:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 438 states have (on average 1.2009132420091324) internal successors, (526), 438 states have internal predecessors, (526), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 530 transitions. [2022-02-15 01:14:10,422 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 530 transitions. Word has length 72 [2022-02-15 01:14:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:10,422 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 530 transitions. [2022-02-15 01:14:10,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 530 transitions. [2022-02-15 01:14:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:14:10,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:10,424 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:10,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:14:10,424 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:10,425 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 10 times [2022-02-15 01:14:10,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:10,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687345783] [2022-02-15 01:14:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:10,426 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:10,426 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:10,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:10,428 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:11,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:11,925 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:11,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687345783] [2022-02-15 01:14:11,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [687345783] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:11,925 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:11,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:14:11,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174460637] [2022-02-15 01:14:11,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:11,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:14:11,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:14:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:14:11,926 INFO L87 Difference]: Start difference. First operand 443 states and 530 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:14,454 INFO L93 Difference]: Finished difference Result 1119 states and 1330 transitions. [2022-02-15 01:14:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:14:14,454 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:14:14,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:14,458 INFO L225 Difference]: With dead ends: 1119 [2022-02-15 01:14:14,458 INFO L226 Difference]: Without dead ends: 1056 [2022-02-15 01:14:14,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=1312, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:14:14,459 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 229 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:14,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 94 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:14:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-02-15 01:14:15,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 591. [2022-02-15 01:14:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 586 states have (on average 1.1962457337883958) internal successors, (701), 586 states have internal predecessors, (701), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:15,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 705 transitions. [2022-02-15 01:14:15,141 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 705 transitions. Word has length 72 [2022-02-15 01:14:15,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:15,142 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 705 transitions. [2022-02-15 01:14:15,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:15,142 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 705 transitions. [2022-02-15 01:14:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:14:15,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:15,143 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:15,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:14:15,144 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 11 times [2022-02-15 01:14:15,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:15,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109731545] [2022-02-15 01:14:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:15,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:15,146 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:15,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:15,147 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:16,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:16,226 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:16,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109731545] [2022-02-15 01:14:16,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109731545] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:16,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:16,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:14:16,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621945857] [2022-02-15 01:14:16,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:16,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:14:16,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:16,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:14:16,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:14:16,227 INFO L87 Difference]: Start difference. First operand 591 states and 705 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:18,405 INFO L93 Difference]: Finished difference Result 1100 states and 1303 transitions. [2022-02-15 01:14:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:14:18,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:14:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:18,408 INFO L225 Difference]: With dead ends: 1100 [2022-02-15 01:14:18,409 INFO L226 Difference]: Without dead ends: 1056 [2022-02-15 01:14:18,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:14:18,409 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 210 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:18,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 92 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:14:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-02-15 01:14:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 753. [2022-02-15 01:14:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 748 states have (on average 1.1925133689839573) internal successors, (892), 748 states have internal predecessors, (892), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 896 transitions. [2022-02-15 01:14:19,309 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 896 transitions. Word has length 72 [2022-02-15 01:14:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:19,309 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 896 transitions. [2022-02-15 01:14:19,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 896 transitions. [2022-02-15 01:14:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:14:19,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:19,311 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:19,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:14:19,312 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 12 times [2022-02-15 01:14:19,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:19,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469282307] [2022-02-15 01:14:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:19,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:19,314 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:19,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:19,315 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:20,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:20,716 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 01:14:20,716 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:20,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469282307] [2022-02-15 01:14:20,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1469282307] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:20,717 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:20,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:14:20,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164646993] [2022-02-15 01:14:20,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:20,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:14:20,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:20,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:14:20,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:14:20,718 INFO L87 Difference]: Start difference. First operand 753 states and 896 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:23,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:23,068 INFO L93 Difference]: Finished difference Result 1284 states and 1517 transitions. [2022-02-15 01:14:23,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:14:23,069 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:14:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:23,071 INFO L225 Difference]: With dead ends: 1284 [2022-02-15 01:14:23,071 INFO L226 Difference]: Without dead ends: 1041 [2022-02-15 01:14:23,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:14:23,072 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 244 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:23,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 73 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:14:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-02-15 01:14:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 768. [2022-02-15 01:14:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 763 states have (on average 1.1874180865006554) internal successors, (906), 763 states have internal predecessors, (906), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 910 transitions. [2022-02-15 01:14:24,123 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 910 transitions. Word has length 72 [2022-02-15 01:14:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:24,123 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 910 transitions. [2022-02-15 01:14:24,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 910 transitions. [2022-02-15 01:14:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:14:24,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:24,126 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:24,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:14:24,126 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:24,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1533502382, now seen corresponding path program 13 times [2022-02-15 01:14:24,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:24,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096425247] [2022-02-15 01:14:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:24,128 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:24,128 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:24,130 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:25,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:25,135 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 01:14:25,136 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:25,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096425247] [2022-02-15 01:14:25,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2096425247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:25,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:25,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:14:25,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003873150] [2022-02-15 01:14:25,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:25,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:14:25,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:25,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:14:25,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:14:25,137 INFO L87 Difference]: Start difference. First operand 768 states and 910 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:27,379 INFO L93 Difference]: Finished difference Result 1253 states and 1460 transitions. [2022-02-15 01:14:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:14:27,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:14:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:27,382 INFO L225 Difference]: With dead ends: 1253 [2022-02-15 01:14:27,382 INFO L226 Difference]: Without dead ends: 1096 [2022-02-15 01:14:27,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:14:27,383 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 181 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:27,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 76 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:14:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-02-15 01:14:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 890. [2022-02-15 01:14:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 885 states have (on average 1.1796610169491526) internal successors, (1044), 885 states have internal predecessors, (1044), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1048 transitions. [2022-02-15 01:14:28,519 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1048 transitions. Word has length 72 [2022-02-15 01:14:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:28,520 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1048 transitions. [2022-02-15 01:14:28,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1048 transitions. [2022-02-15 01:14:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:14:28,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:28,522 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:28,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:14:28,522 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash -532379858, now seen corresponding path program 14 times [2022-02-15 01:14:28,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:28,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170662028] [2022-02-15 01:14:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:28,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:28,524 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:28,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:28,525 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:29,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:29,587 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 01:14:29,587 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:29,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170662028] [2022-02-15 01:14:29,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [170662028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:29,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:29,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:14:29,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169694973] [2022-02-15 01:14:29,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:29,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:14:29,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:14:29,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:14:29,588 INFO L87 Difference]: Start difference. First operand 890 states and 1048 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:31,714 INFO L93 Difference]: Finished difference Result 1216 states and 1406 transitions. [2022-02-15 01:14:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:14:31,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:14:31,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:31,717 INFO L225 Difference]: With dead ends: 1216 [2022-02-15 01:14:31,717 INFO L226 Difference]: Without dead ends: 1096 [2022-02-15 01:14:31,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:14:31,718 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 174 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:31,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 63 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:14:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-02-15 01:14:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 905. [2022-02-15 01:14:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 900 states have (on average 1.1688888888888889) internal successors, (1052), 900 states have internal predecessors, (1052), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1056 transitions. [2022-02-15 01:14:32,845 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1056 transitions. Word has length 72 [2022-02-15 01:14:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:32,845 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1056 transitions. [2022-02-15 01:14:32,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1056 transitions. [2022-02-15 01:14:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:14:32,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:32,847 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:32,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:14:32,848 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1520169742, now seen corresponding path program 15 times [2022-02-15 01:14:32,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:32,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000268797] [2022-02-15 01:14:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:32,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:32,850 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:32,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:32,851 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:33,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:33,943 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:33,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000268797] [2022-02-15 01:14:33,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000268797] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:33,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:33,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:14:33,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204665536] [2022-02-15 01:14:33,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:33,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:14:33,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:14:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:14:33,945 INFO L87 Difference]: Start difference. First operand 905 states and 1056 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:36,113 INFO L93 Difference]: Finished difference Result 1195 states and 1375 transitions. [2022-02-15 01:14:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:14:36,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:14:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:36,115 INFO L225 Difference]: With dead ends: 1195 [2022-02-15 01:14:36,115 INFO L226 Difference]: Without dead ends: 1096 [2022-02-15 01:14:36,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:14:36,116 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 218 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:36,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 44 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:14:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-02-15 01:14:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 893. [2022-02-15 01:14:37,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 888 states have (on average 1.1632882882882882) internal successors, (1033), 888 states have internal predecessors, (1033), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1037 transitions. [2022-02-15 01:14:37,257 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1037 transitions. Word has length 72 [2022-02-15 01:14:37,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:37,257 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1037 transitions. [2022-02-15 01:14:37,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:37,257 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1037 transitions. [2022-02-15 01:14:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 01:14:37,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:37,259 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:37,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:14:37,259 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 16 times [2022-02-15 01:14:37,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:37,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821009567] [2022-02-15 01:14:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:37,261 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:37,261 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:37,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:37,262 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:37,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:37,434 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 01:14:37,434 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:37,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821009567] [2022-02-15 01:14:37,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [821009567] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:37,435 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:37,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:14:37,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808628903] [2022-02-15 01:14:37,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:37,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:14:37,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:14:37,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:14:37,436 INFO L87 Difference]: Start difference. First operand 893 states and 1037 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:41,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:41,980 INFO L93 Difference]: Finished difference Result 2837 states and 3345 transitions. [2022-02-15 01:14:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:14:41,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 01:14:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:41,986 INFO L225 Difference]: With dead ends: 2837 [2022-02-15 01:14:41,986 INFO L226 Difference]: Without dead ends: 2762 [2022-02-15 01:14:41,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:14:41,987 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 322 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:41,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 170 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:14:41,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2022-02-15 01:14:43,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 893. [2022-02-15 01:14:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 888 states have (on average 1.1632882882882882) internal successors, (1033), 888 states have internal predecessors, (1033), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1037 transitions. [2022-02-15 01:14:43,147 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1037 transitions. Word has length 73 [2022-02-15 01:14:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:43,147 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1037 transitions. [2022-02-15 01:14:43,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1037 transitions. [2022-02-15 01:14:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:14:43,149 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:43,150 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:43,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:14:43,150 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:43,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:43,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1623991599, now seen corresponding path program 17 times [2022-02-15 01:14:43,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:43,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392988764] [2022-02-15 01:14:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:43,152 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:43,152 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:43,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:43,153 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:43,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:43,274 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 01:14:43,274 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:43,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392988764] [2022-02-15 01:14:43,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392988764] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:43,274 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:43,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:14:43,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143514880] [2022-02-15 01:14:43,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:43,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:14:43,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:14:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:14:43,275 INFO L87 Difference]: Start difference. First operand 893 states and 1037 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:45,932 INFO L93 Difference]: Finished difference Result 1772 states and 2059 transitions. [2022-02-15 01:14:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:14:45,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:14:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:45,936 INFO L225 Difference]: With dead ends: 1772 [2022-02-15 01:14:45,936 INFO L226 Difference]: Without dead ends: 1619 [2022-02-15 01:14:45,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:14:45,937 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 256 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:45,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 81 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:14:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-02-15 01:14:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 971. [2022-02-15 01:14:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 966 states have (on average 1.1583850931677018) internal successors, (1119), 966 states have internal predecessors, (1119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1123 transitions. [2022-02-15 01:14:47,207 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1123 transitions. Word has length 74 [2022-02-15 01:14:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:47,207 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1123 transitions. [2022-02-15 01:14:47,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1123 transitions. [2022-02-15 01:14:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:14:47,209 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:47,209 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:47,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:14:47,209 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1752054978, now seen corresponding path program 7 times [2022-02-15 01:14:47,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:47,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455629723] [2022-02-15 01:14:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:47,211 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:47,211 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:47,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:47,213 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:47,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:47,413 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:47,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455629723] [2022-02-15 01:14:47,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [455629723] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:47,413 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:47,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:14:47,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771746157] [2022-02-15 01:14:47,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:47,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:14:47,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:47,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:14:47,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:14:47,414 INFO L87 Difference]: Start difference. First operand 971 states and 1123 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:54,907 INFO L93 Difference]: Finished difference Result 4466 states and 5305 transitions. [2022-02-15 01:14:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:14:54,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:14:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:54,919 INFO L225 Difference]: With dead ends: 4466 [2022-02-15 01:14:54,919 INFO L226 Difference]: Without dead ends: 4422 [2022-02-15 01:14:54,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:14:54,920 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 419 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3286 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:54,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 285 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3286 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:14:54,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4422 states. [2022-02-15 01:14:56,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4422 to 973. [2022-02-15 01:14:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.1590909090909092) internal successors, (1122), 968 states have internal predecessors, (1122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1126 transitions. [2022-02-15 01:14:56,204 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1126 transitions. Word has length 74 [2022-02-15 01:14:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:56,204 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1126 transitions. [2022-02-15 01:14:56,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1126 transitions. [2022-02-15 01:14:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 01:14:56,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:56,206 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:56,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:14:56,206 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 18 times [2022-02-15 01:14:56,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:56,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122683160] [2022-02-15 01:14:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:56,208 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:56,208 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:56,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:56,210 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:56,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:56,401 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 01:14:56,402 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:56,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122683160] [2022-02-15 01:14:56,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [122683160] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:56,402 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:56,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:14:56,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405588061] [2022-02-15 01:14:56,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:56,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:14:56,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:56,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:14:56,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:14:56,403 INFO L87 Difference]: Start difference. First operand 973 states and 1126 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:01,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:01,976 INFO L93 Difference]: Finished difference Result 3224 states and 3802 transitions. [2022-02-15 01:15:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:15:01,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-02-15 01:15:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:01,983 INFO L225 Difference]: With dead ends: 3224 [2022-02-15 01:15:01,983 INFO L226 Difference]: Without dead ends: 3149 [2022-02-15 01:15:01,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:15:01,984 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 339 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:01,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 194 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:15:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2022-02-15 01:15:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 973. [2022-02-15 01:15:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.1590909090909092) internal successors, (1122), 968 states have internal predecessors, (1122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1126 transitions. [2022-02-15 01:15:03,337 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1126 transitions. Word has length 75 [2022-02-15 01:15:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:03,338 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1126 transitions. [2022-02-15 01:15:03,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1126 transitions. [2022-02-15 01:15:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 01:15:03,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:03,339 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:03,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:15:03,339 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:03,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1908734380, now seen corresponding path program 19 times [2022-02-15 01:15:03,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:03,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203543784] [2022-02-15 01:15:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:03,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:03,341 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:03,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:03,342 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:03,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:03,485 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 01:15:03,485 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:03,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203543784] [2022-02-15 01:15:03,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203543784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:03,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:03,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:15:03,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566172095] [2022-02-15 01:15:03,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:03,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:15:03,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:03,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:15:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:15:03,486 INFO L87 Difference]: Start difference. First operand 973 states and 1126 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:06,868 INFO L93 Difference]: Finished difference Result 2118 states and 2475 transitions. [2022-02-15 01:15:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:15:06,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 01:15:06,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:06,872 INFO L225 Difference]: With dead ends: 2118 [2022-02-15 01:15:06,872 INFO L226 Difference]: Without dead ends: 1965 [2022-02-15 01:15:06,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:15:06,874 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 274 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:06,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 99 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:15:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-02-15 01:15:08,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 973. [2022-02-15 01:15:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.1590909090909092) internal successors, (1122), 968 states have internal predecessors, (1122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1126 transitions. [2022-02-15 01:15:08,198 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1126 transitions. Word has length 76 [2022-02-15 01:15:08,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:08,198 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1126 transitions. [2022-02-15 01:15:08,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:08,198 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1126 transitions. [2022-02-15 01:15:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 01:15:08,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:08,200 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:08,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:15:08,202 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:08,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1780671001, now seen corresponding path program 8 times [2022-02-15 01:15:08,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:08,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659112442] [2022-02-15 01:15:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:08,204 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:08,204 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:08,206 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:08,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:08,468 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 01:15:08,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:08,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659112442] [2022-02-15 01:15:08,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1659112442] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:08,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:08,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:15:08,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946864348] [2022-02-15 01:15:08,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:08,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:15:08,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:08,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:15:08,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:15:08,470 INFO L87 Difference]: Start difference. First operand 973 states and 1126 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:18,284 INFO L93 Difference]: Finished difference Result 5206 states and 6186 transitions. [2022-02-15 01:15:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:15:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 01:15:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:18,292 INFO L225 Difference]: With dead ends: 5206 [2022-02-15 01:15:18,292 INFO L226 Difference]: Without dead ends: 5162 [2022-02-15 01:15:18,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:15:18,293 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 514 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4411 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 4442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:18,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 319 Invalid, 4442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4411 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:15:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2022-02-15 01:15:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 977. [2022-02-15 01:15:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.1604938271604939) internal successors, (1128), 972 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1132 transitions. [2022-02-15 01:15:19,673 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1132 transitions. Word has length 76 [2022-02-15 01:15:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:19,674 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1132 transitions. [2022-02-15 01:15:19,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1132 transitions. [2022-02-15 01:15:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:15:19,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:19,675 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:19,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:15:19,675 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:19,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 20 times [2022-02-15 01:15:19,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:19,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830512146] [2022-02-15 01:15:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:19,676 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:19,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:19,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:19,678 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:19,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:19,884 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 01:15:19,884 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:19,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830512146] [2022-02-15 01:15:19,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830512146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:19,885 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:19,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:15:19,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768549527] [2022-02-15 01:15:19,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:19,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:15:19,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:19,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:15:19,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:15:19,886 INFO L87 Difference]: Start difference. First operand 977 states and 1132 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:26,721 INFO L93 Difference]: Finished difference Result 3613 states and 4262 transitions. [2022-02-15 01:15:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:15:26,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:15:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:26,727 INFO L225 Difference]: With dead ends: 3613 [2022-02-15 01:15:26,727 INFO L226 Difference]: Without dead ends: 3538 [2022-02-15 01:15:26,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:15:26,728 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 369 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:26,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 218 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:15:26,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2022-02-15 01:15:28,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 977. [2022-02-15 01:15:28,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.1604938271604939) internal successors, (1128), 972 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1132 transitions. [2022-02-15 01:15:28,123 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1132 transitions. Word has length 77 [2022-02-15 01:15:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:28,123 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1132 transitions. [2022-02-15 01:15:28,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1132 transitions. [2022-02-15 01:15:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 01:15:28,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:28,125 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:28,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:15:28,125 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:28,125 INFO L85 PathProgramCache]: Analyzing trace with hash -460730937, now seen corresponding path program 21 times [2022-02-15 01:15:28,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:28,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117133310] [2022-02-15 01:15:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:28,126 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:28,126 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:28,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:28,128 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:28,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:28,286 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:28,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117133310] [2022-02-15 01:15:28,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2117133310] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:28,286 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:28,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:15:28,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613952675] [2022-02-15 01:15:28,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:28,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:15:28,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:15:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:15:28,287 INFO L87 Difference]: Start difference. First operand 977 states and 1132 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:32,871 INFO L93 Difference]: Finished difference Result 2560 states and 2996 transitions. [2022-02-15 01:15:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:15:32,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 01:15:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:32,875 INFO L225 Difference]: With dead ends: 2560 [2022-02-15 01:15:32,875 INFO L226 Difference]: Without dead ends: 2407 [2022-02-15 01:15:32,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:15:32,876 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 341 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:32,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 124 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:15:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2022-02-15 01:15:34,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 977. [2022-02-15 01:15:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.1604938271604939) internal successors, (1128), 972 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1132 transitions. [2022-02-15 01:15:34,360 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1132 transitions. Word has length 78 [2022-02-15 01:15:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:34,360 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1132 transitions. [2022-02-15 01:15:34,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1132 transitions. [2022-02-15 01:15:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 01:15:34,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:34,361 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:34,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:15:34,361 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:34,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 22 times [2022-02-15 01:15:34,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:34,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762418756] [2022-02-15 01:15:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:34,363 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:34,363 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:34,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:34,364 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:34,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:34,613 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:34,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762418756] [2022-02-15 01:15:34,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762418756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:34,613 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:34,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:15:34,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997221685] [2022-02-15 01:15:34,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:34,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:15:34,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:34,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:15:34,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:15:34,614 INFO L87 Difference]: Start difference. First operand 977 states and 1132 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:42,457 INFO L93 Difference]: Finished difference Result 3998 states and 4716 transitions. [2022-02-15 01:15:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:15:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-02-15 01:15:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:42,464 INFO L225 Difference]: With dead ends: 3998 [2022-02-15 01:15:42,464 INFO L226 Difference]: Without dead ends: 3923 [2022-02-15 01:15:42,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:15:42,465 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 406 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2516 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:42,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 237 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2516 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:15:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2022-02-15 01:15:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 977. [2022-02-15 01:15:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.1604938271604939) internal successors, (1128), 972 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1132 transitions. [2022-02-15 01:15:43,951 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1132 transitions. Word has length 79 [2022-02-15 01:15:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:43,951 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1132 transitions. [2022-02-15 01:15:43,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1132 transitions. [2022-02-15 01:15:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:15:43,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:43,952 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:43,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:15:43,953 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:43,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1184233694, now seen corresponding path program 23 times [2022-02-15 01:15:43,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:43,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356918624] [2022-02-15 01:15:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:43,954 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:43,954 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:43,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:43,955 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:44,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:44,127 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 01:15:44,127 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:44,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356918624] [2022-02-15 01:15:44,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356918624] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:44,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:44,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:15:44,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908854698] [2022-02-15 01:15:44,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:44,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:15:44,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:44,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:15:44,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:15:44,129 INFO L87 Difference]: Start difference. First operand 977 states and 1132 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:49,583 INFO L93 Difference]: Finished difference Result 2902 states and 3399 transitions. [2022-02-15 01:15:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:15:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:15:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:49,588 INFO L225 Difference]: With dead ends: 2902 [2022-02-15 01:15:49,588 INFO L226 Difference]: Without dead ends: 2749 [2022-02-15 01:15:49,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:15:49,589 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 321 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:49,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 157 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:15:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2022-02-15 01:15:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 977. [2022-02-15 01:15:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.1604938271604939) internal successors, (1128), 972 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1132 transitions. [2022-02-15 01:15:51,106 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1132 transitions. Word has length 80 [2022-02-15 01:15:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:51,107 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1132 transitions. [2022-02-15 01:15:51,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1132 transitions. [2022-02-15 01:15:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:15:51,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:51,109 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:51,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 01:15:51,109 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1312297073, now seen corresponding path program 9 times [2022-02-15 01:15:51,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:51,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001208147] [2022-02-15 01:15:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:51,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:51,111 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:51,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:51,114 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:51,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:51,402 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:51,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001208147] [2022-02-15 01:15:51,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2001208147] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:51,402 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:51,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:15:51,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781447855] [2022-02-15 01:15:51,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:51,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:15:51,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:15:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:15:51,404 INFO L87 Difference]: Start difference. First operand 977 states and 1132 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:04,474 INFO L93 Difference]: Finished difference Result 5980 states and 7100 transitions. [2022-02-15 01:16:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:16:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:16:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:04,483 INFO L225 Difference]: With dead ends: 5980 [2022-02-15 01:16:04,484 INFO L226 Difference]: Without dead ends: 5936 [2022-02-15 01:16:04,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:16:04,485 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 600 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5469 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 5469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:04,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 362 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 5469 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:16:04,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2022-02-15 01:16:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 981. [2022-02-15 01:16:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 976 states have (on average 1.1618852459016393) internal successors, (1134), 976 states have internal predecessors, (1134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1138 transitions. [2022-02-15 01:16:06,054 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1138 transitions. Word has length 80 [2022-02-15 01:16:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:06,054 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1138 transitions. [2022-02-15 01:16:06,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1138 transitions. [2022-02-15 01:16:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 01:16:06,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:06,056 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:06,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 01:16:06,056 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:06,056 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 24 times [2022-02-15 01:16:06,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:06,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923344612] [2022-02-15 01:16:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:06,057 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:06,057 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:06,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:06,058 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:06,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:06,196 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:06,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923344612] [2022-02-15 01:16:06,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [923344612] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:06,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:06,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:16:06,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093678424] [2022-02-15 01:16:06,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:06,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:16:06,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:16:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:16:06,197 INFO L87 Difference]: Start difference. First operand 981 states and 1138 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:07,650 INFO L93 Difference]: Finished difference Result 1238 states and 1420 transitions. [2022-02-15 01:16:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:16:07,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-02-15 01:16:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:07,652 INFO L225 Difference]: With dead ends: 1238 [2022-02-15 01:16:07,652 INFO L226 Difference]: Without dead ends: 717 [2022-02-15 01:16:07,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:16:07,653 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:07,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 71 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:16:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-15 01:16:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 656. [2022-02-15 01:16:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 651 states have (on average 1.1612903225806452) internal successors, (756), 651 states have internal predecessors, (756), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 760 transitions. [2022-02-15 01:16:08,707 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 760 transitions. Word has length 81 [2022-02-15 01:16:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:08,707 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 760 transitions. [2022-02-15 01:16:08,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 760 transitions. [2022-02-15 01:16:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 01:16:08,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:08,708 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:08,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 01:16:08,708 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:08,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 25 times [2022-02-15 01:16:08,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:08,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755735589] [2022-02-15 01:16:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:08,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:08,710 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:08,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:08,711 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:08,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:08,966 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 01:16:08,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:08,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755735589] [2022-02-15 01:16:08,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [755735589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:08,967 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:08,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:16:08,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105289149] [2022-02-15 01:16:08,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:08,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:16:08,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:08,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:16:08,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:16:08,968 INFO L87 Difference]: Start difference. First operand 656 states and 760 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:18,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:18,065 INFO L93 Difference]: Finished difference Result 4017 states and 4747 transitions. [2022-02-15 01:16:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:16:18,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-02-15 01:16:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:18,070 INFO L225 Difference]: With dead ends: 4017 [2022-02-15 01:16:18,070 INFO L226 Difference]: Without dead ends: 3942 [2022-02-15 01:16:18,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:16:18,071 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 441 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3227 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:18,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 266 Invalid, 3257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3227 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:16:18,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2022-02-15 01:16:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 656. [2022-02-15 01:16:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 651 states have (on average 1.1612903225806452) internal successors, (756), 651 states have internal predecessors, (756), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 760 transitions. [2022-02-15 01:16:19,194 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 760 transitions. Word has length 81 [2022-02-15 01:16:19,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:19,195 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 760 transitions. [2022-02-15 01:16:19,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 760 transitions. [2022-02-15 01:16:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 01:16:19,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:19,196 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:19,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 01:16:19,196 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 26 times [2022-02-15 01:16:19,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:19,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683604241] [2022-02-15 01:16:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:19,197 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:19,198 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:19,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:19,199 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:20,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:20,008 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:20,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683604241] [2022-02-15 01:16:20,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [683604241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:20,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:20,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:16:20,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646250796] [2022-02-15 01:16:20,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:20,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:16:20,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:20,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:16:20,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:16:20,009 INFO L87 Difference]: Start difference. First operand 656 states and 760 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:21,750 INFO L93 Difference]: Finished difference Result 707 states and 815 transitions. [2022-02-15 01:16:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:16:21,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-02-15 01:16:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:21,751 INFO L225 Difference]: With dead ends: 707 [2022-02-15 01:16:21,751 INFO L226 Difference]: Without dead ends: 502 [2022-02-15 01:16:21,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:16:21,752 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 199 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:21,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 41 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:16:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-02-15 01:16:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2022-02-15 01:16:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 497 states have (on average 1.193158953722334) internal successors, (593), 497 states have internal predecessors, (593), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 597 transitions. [2022-02-15 01:16:22,608 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 597 transitions. Word has length 82 [2022-02-15 01:16:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:22,608 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 597 transitions. [2022-02-15 01:16:22,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 597 transitions. [2022-02-15 01:16:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 01:16:22,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:22,609 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:22,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 01:16:22,609 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:22,609 INFO L85 PathProgramCache]: Analyzing trace with hash -685681219, now seen corresponding path program 27 times [2022-02-15 01:16:22,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:22,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879999823] [2022-02-15 01:16:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:22,611 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:22,611 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:22,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:22,612 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:22,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:22,802 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:22,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879999823] [2022-02-15 01:16:22,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [879999823] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:22,803 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:22,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:16:22,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611069686] [2022-02-15 01:16:22,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:22,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:16:22,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:22,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:16:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:16:22,804 INFO L87 Difference]: Start difference. First operand 502 states and 597 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:28,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:28,765 INFO L93 Difference]: Finished difference Result 2725 states and 3220 transitions. [2022-02-15 01:16:28,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:16:28,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-02-15 01:16:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:28,768 INFO L225 Difference]: With dead ends: 2725 [2022-02-15 01:16:28,768 INFO L226 Difference]: Without dead ends: 2572 [2022-02-15 01:16:28,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:16:28,769 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 309 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:28,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 165 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:16:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-02-15 01:16:29,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 502. [2022-02-15 01:16:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 497 states have (on average 1.193158953722334) internal successors, (593), 497 states have internal predecessors, (593), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 597 transitions. [2022-02-15 01:16:29,677 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 597 transitions. Word has length 82 [2022-02-15 01:16:29,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:29,678 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 597 transitions. [2022-02-15 01:16:29,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 597 transitions. [2022-02-15 01:16:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:16:29,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:29,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:29,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 01:16:29,679 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 28 times [2022-02-15 01:16:29,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:29,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141426799] [2022-02-15 01:16:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:29,681 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:29,681 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:29,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:29,683 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:30,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:30,059 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 01:16:30,059 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:30,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141426799] [2022-02-15 01:16:30,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141426799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:30,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:30,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:16:30,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422400494] [2022-02-15 01:16:30,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:30,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:16:30,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:16:30,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:16:30,061 INFO L87 Difference]: Start difference. First operand 502 states and 597 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:32,049 INFO L93 Difference]: Finished difference Result 765 states and 905 transitions. [2022-02-15 01:16:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:16:32,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:16:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:32,051 INFO L225 Difference]: With dead ends: 765 [2022-02-15 01:16:32,051 INFO L226 Difference]: Without dead ends: 760 [2022-02-15 01:16:32,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:16:32,052 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 171 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:32,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 73 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:16:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-02-15 01:16:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 555. [2022-02-15 01:16:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.1890909090909092) internal successors, (654), 550 states have internal predecessors, (654), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 658 transitions. [2022-02-15 01:16:33,118 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 658 transitions. Word has length 83 [2022-02-15 01:16:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:33,118 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 658 transitions. [2022-02-15 01:16:33,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:33,118 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 658 transitions. [2022-02-15 01:16:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:16:33,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:33,119 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:33,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 01:16:33,119 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 29 times [2022-02-15 01:16:33,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:33,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053226551] [2022-02-15 01:16:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:33,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:33,121 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:33,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:33,122 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:33,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:33,297 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 01:16:33,298 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:33,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053226551] [2022-02-15 01:16:33,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1053226551] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:33,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:33,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:16:33,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921183762] [2022-02-15 01:16:33,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:33,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:16:33,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:33,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:16:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:16:33,299 INFO L87 Difference]: Start difference. First operand 555 states and 658 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:36,004 INFO L93 Difference]: Finished difference Result 910 states and 1069 transitions. [2022-02-15 01:16:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:16:36,005 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:16:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:36,006 INFO L225 Difference]: With dead ends: 910 [2022-02-15 01:16:36,006 INFO L226 Difference]: Without dead ends: 905 [2022-02-15 01:16:36,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:16:36,006 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 245 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:36,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 194 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:16:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-02-15 01:16:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 673. [2022-02-15 01:16:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 668 states have (on average 1.187125748502994) internal successors, (793), 668 states have internal predecessors, (793), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 797 transitions. [2022-02-15 01:16:37,396 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 797 transitions. Word has length 93 [2022-02-15 01:16:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:37,396 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 797 transitions. [2022-02-15 01:16:37,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:37,396 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 797 transitions. [2022-02-15 01:16:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:16:37,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:37,397 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:37,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 01:16:37,397 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:37,398 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 30 times [2022-02-15 01:16:37,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:37,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80500928] [2022-02-15 01:16:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:37,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:37,399 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:37,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:37,400 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:38,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:38,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:38,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80500928] [2022-02-15 01:16:38,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [80500928] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:38,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:38,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:16:38,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667373452] [2022-02-15 01:16:38,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:38,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:16:38,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:16:38,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:16:38,517 INFO L87 Difference]: Start difference. First operand 673 states and 797 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:42,114 INFO L93 Difference]: Finished difference Result 1413 states and 1663 transitions. [2022-02-15 01:16:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:16:42,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:16:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:42,116 INFO L225 Difference]: With dead ends: 1413 [2022-02-15 01:16:42,116 INFO L226 Difference]: Without dead ends: 1346 [2022-02-15 01:16:42,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:16:42,117 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 268 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:42,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 83 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:16:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-02-15 01:16:44,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1057. [2022-02-15 01:16:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1052 states have (on average 1.1920152091254752) internal successors, (1254), 1052 states have internal predecessors, (1254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1258 transitions. [2022-02-15 01:16:44,472 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1258 transitions. Word has length 93 [2022-02-15 01:16:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:44,472 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1258 transitions. [2022-02-15 01:16:44,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1258 transitions. [2022-02-15 01:16:44,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:16:44,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:44,474 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:44,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 01:16:44,474 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 31 times [2022-02-15 01:16:44,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:44,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217825780] [2022-02-15 01:16:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:44,476 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:44,476 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:44,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:44,477 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:46,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:46,153 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 01:16:46,153 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:46,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217825780] [2022-02-15 01:16:46,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [217825780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:46,154 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:46,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:16:46,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553638349] [2022-02-15 01:16:46,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:46,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:16:46,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:16:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:16:46,155 INFO L87 Difference]: Start difference. First operand 1057 states and 1258 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:53,616 INFO L93 Difference]: Finished difference Result 2650 states and 3127 transitions. [2022-02-15 01:16:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:16:53,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:16:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:53,619 INFO L225 Difference]: With dead ends: 2650 [2022-02-15 01:16:53,619 INFO L226 Difference]: Without dead ends: 2571 [2022-02-15 01:16:53,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:16:53,620 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 263 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:53,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 99 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:16:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2022-02-15 01:16:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1513. [2022-02-15 01:16:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1508 states have (on average 1.1883289124668435) internal successors, (1792), 1508 states have internal predecessors, (1792), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 1796 transitions. [2022-02-15 01:16:57,061 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 1796 transitions. Word has length 93 [2022-02-15 01:16:57,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:57,061 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 1796 transitions. [2022-02-15 01:16:57,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 1796 transitions. [2022-02-15 01:16:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:16:57,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:57,064 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:57,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 01:16:57,064 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:57,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 32 times [2022-02-15 01:16:57,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:57,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110545250] [2022-02-15 01:16:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:57,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:57,066 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:57,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:57,067 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:58,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:58,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:58,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110545250] [2022-02-15 01:16:58,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2110545250] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:58,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:58,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:16:58,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515206432] [2022-02-15 01:16:58,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:58,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:16:58,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:58,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:16:58,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:16:58,262 INFO L87 Difference]: Start difference. First operand 1513 states and 1796 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:05,719 INFO L93 Difference]: Finished difference Result 2655 states and 3131 transitions. [2022-02-15 01:17:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:17:05,720 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:17:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:05,723 INFO L225 Difference]: With dead ends: 2655 [2022-02-15 01:17:05,723 INFO L226 Difference]: Without dead ends: 2598 [2022-02-15 01:17:05,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:17:05,724 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 276 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:05,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 103 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:17:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2022-02-15 01:17:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1946. [2022-02-15 01:17:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1941 states have (on average 1.1854714064914993) internal successors, (2301), 1941 states have internal predecessors, (2301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2305 transitions. [2022-02-15 01:17:10,320 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2305 transitions. Word has length 93 [2022-02-15 01:17:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:10,320 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2305 transitions. [2022-02-15 01:17:10,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2305 transitions. [2022-02-15 01:17:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:17:10,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:10,323 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:10,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 01:17:10,323 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:10,323 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 33 times [2022-02-15 01:17:10,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:10,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674155258] [2022-02-15 01:17:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:10,325 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:10,325 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:10,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:10,326 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:11,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:11,888 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:11,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674155258] [2022-02-15 01:17:11,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674155258] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:11,888 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:11,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:17:11,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788673569] [2022-02-15 01:17:11,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:11,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:17:11,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:17:11,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:17:11,889 INFO L87 Difference]: Start difference. First operand 1946 states and 2305 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:19,130 INFO L93 Difference]: Finished difference Result 2589 states and 3046 transitions. [2022-02-15 01:17:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:17:19,131 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:17:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:19,133 INFO L225 Difference]: With dead ends: 2589 [2022-02-15 01:17:19,133 INFO L226 Difference]: Without dead ends: 2535 [2022-02-15 01:17:19,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:17:19,134 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 311 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:19,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 98 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:17:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2022-02-15 01:17:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1949. [2022-02-15 01:17:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1944 states have (on average 1.1851851851851851) internal successors, (2304), 1944 states have internal predecessors, (2304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2308 transitions. [2022-02-15 01:17:23,715 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2308 transitions. Word has length 93 [2022-02-15 01:17:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:23,716 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 2308 transitions. [2022-02-15 01:17:23,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2308 transitions. [2022-02-15 01:17:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:17:23,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:23,719 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:23,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 01:17:23,719 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:23,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1261895563, now seen corresponding path program 34 times [2022-02-15 01:17:23,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:23,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780883174] [2022-02-15 01:17:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:23,721 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:23,721 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:23,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:23,723 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:25,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:25,172 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:25,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780883174] [2022-02-15 01:17:25,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1780883174] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:25,172 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:25,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:17:25,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573186747] [2022-02-15 01:17:25,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:25,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:17:25,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:17:25,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:17:25,173 INFO L87 Difference]: Start difference. First operand 1949 states and 2308 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:33,737 INFO L93 Difference]: Finished difference Result 3161 states and 3715 transitions. [2022-02-15 01:17:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:17:33,737 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:17:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:33,740 INFO L225 Difference]: With dead ends: 3161 [2022-02-15 01:17:33,741 INFO L226 Difference]: Without dead ends: 2958 [2022-02-15 01:17:33,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:17:33,742 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 207 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:33,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 71 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:17:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2022-02-15 01:17:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2386. [2022-02-15 01:17:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2381 states have (on average 1.1818563628727425) internal successors, (2814), 2381 states have internal predecessors, (2814), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 2818 transitions. [2022-02-15 01:17:39,447 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 2818 transitions. Word has length 93 [2022-02-15 01:17:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:39,447 INFO L470 AbstractCegarLoop]: Abstraction has 2386 states and 2818 transitions. [2022-02-15 01:17:39,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 2818 transitions. [2022-02-15 01:17:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:17:39,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:39,450 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:39,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 01:17:39,450 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:39,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:39,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1038747787, now seen corresponding path program 35 times [2022-02-15 01:17:39,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:39,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852303635] [2022-02-15 01:17:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:39,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:39,452 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:39,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:39,454 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:40,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:40,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:40,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852303635] [2022-02-15 01:17:40,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [852303635] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:40,581 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:40,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:17:40,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814636386] [2022-02-15 01:17:40,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:40,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:17:40,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:40,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:17:40,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:17:40,582 INFO L87 Difference]: Start difference. First operand 2386 states and 2818 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:48,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:48,574 INFO L93 Difference]: Finished difference Result 3085 states and 3610 transitions. [2022-02-15 01:17:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:17:48,575 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:17:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:48,579 INFO L225 Difference]: With dead ends: 3085 [2022-02-15 01:17:48,579 INFO L226 Difference]: Without dead ends: 2919 [2022-02-15 01:17:48,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:17:48,580 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 212 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:48,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 77 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:17:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2022-02-15 01:17:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2554. [2022-02-15 01:17:54,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2549 states have (on average 1.1777167516673206) internal successors, (3002), 2549 states have internal predecessors, (3002), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 3006 transitions. [2022-02-15 01:17:54,651 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 3006 transitions. Word has length 93 [2022-02-15 01:17:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:54,651 INFO L470 AbstractCegarLoop]: Abstraction has 2554 states and 3006 transitions. [2022-02-15 01:17:54,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 3006 transitions. [2022-02-15 01:17:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:17:54,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:54,654 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:54,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 01:17:54,655 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:54,655 INFO L85 PathProgramCache]: Analyzing trace with hash 50957903, now seen corresponding path program 36 times [2022-02-15 01:17:54,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:54,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130981204] [2022-02-15 01:17:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:54,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:54,657 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:54,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:54,658 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:55,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:55,853 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:55,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130981204] [2022-02-15 01:17:55,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2130981204] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:55,853 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:55,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:17:55,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726722465] [2022-02-15 01:17:55,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:55,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:17:55,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:55,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:17:55,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:17:55,854 INFO L87 Difference]: Start difference. First operand 2554 states and 3006 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:04,071 INFO L93 Difference]: Finished difference Result 3273 states and 3821 transitions. [2022-02-15 01:18:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:18:04,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:18:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:04,075 INFO L225 Difference]: With dead ends: 3273 [2022-02-15 01:18:04,075 INFO L226 Difference]: Without dead ends: 3122 [2022-02-15 01:18:04,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:18:04,076 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 202 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:04,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 87 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:18:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2022-02-15 01:18:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 2865. [2022-02-15 01:18:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2860 states have (on average 1.1772727272727272) internal successors, (3367), 2860 states have internal predecessors, (3367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3371 transitions. [2022-02-15 01:18:10,895 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3371 transitions. Word has length 93 [2022-02-15 01:18:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:10,895 INFO L470 AbstractCegarLoop]: Abstraction has 2865 states and 3371 transitions. [2022-02-15 01:18:10,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3371 transitions. [2022-02-15 01:18:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:18:10,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:10,898 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:10,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 01:18:10,898 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:10,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash -528878317, now seen corresponding path program 37 times [2022-02-15 01:18:10,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:10,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932120385] [2022-02-15 01:18:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:10,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:10,900 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:10,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:10,901 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:12,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:12,021 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 01:18:12,021 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:12,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932120385] [2022-02-15 01:18:12,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [932120385] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:12,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:12,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:18:12,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290621731] [2022-02-15 01:18:12,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:12,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:18:12,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:12,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:18:12,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:18:12,022 INFO L87 Difference]: Start difference. First operand 2865 states and 3371 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:22,957 INFO L93 Difference]: Finished difference Result 4447 states and 5132 transitions. [2022-02-15 01:18:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:18:22,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:18:22,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:22,962 INFO L225 Difference]: With dead ends: 4447 [2022-02-15 01:18:22,962 INFO L226 Difference]: Without dead ends: 3902 [2022-02-15 01:18:22,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:18:22,964 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 180 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:22,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 63 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:18:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-02-15 01:18:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3327. [2022-02-15 01:18:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3322 states have (on average 1.1742925948223961) internal successors, (3901), 3322 states have internal predecessors, (3901), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 3905 transitions. [2022-02-15 01:18:30,662 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 3905 transitions. Word has length 93 [2022-02-15 01:18:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:30,663 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 3905 transitions. [2022-02-15 01:18:30,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 3905 transitions. [2022-02-15 01:18:30,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:18:30,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:30,667 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:30,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 01:18:30,667 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash -254667825, now seen corresponding path program 38 times [2022-02-15 01:18:30,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:30,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404867708] [2022-02-15 01:18:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:30,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:30,669 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:30,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:30,671 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:31,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:31,513 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:31,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404867708] [2022-02-15 01:18:31,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1404867708] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:31,514 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:31,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:18:31,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804798116] [2022-02-15 01:18:31,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:31,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:18:31,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:18:31,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:18:31,515 INFO L87 Difference]: Start difference. First operand 3327 states and 3905 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:41,821 INFO L93 Difference]: Finished difference Result 4329 states and 4963 transitions. [2022-02-15 01:18:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:18:41,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:18:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:41,826 INFO L225 Difference]: With dead ends: 4329 [2022-02-15 01:18:41,826 INFO L226 Difference]: Without dead ends: 3902 [2022-02-15 01:18:41,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:18:41,827 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:41,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 75 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:18:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-02-15 01:18:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3378. [2022-02-15 01:18:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3373 states have (on average 1.1654313667358434) internal successors, (3931), 3373 states have internal predecessors, (3931), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 3935 transitions. [2022-02-15 01:18:49,483 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 3935 transitions. Word has length 93 [2022-02-15 01:18:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:49,483 INFO L470 AbstractCegarLoop]: Abstraction has 3378 states and 3935 transitions. [2022-02-15 01:18:49,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 3935 transitions. [2022-02-15 01:18:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:18:49,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:49,488 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:49,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 01:18:49,488 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash -349686637, now seen corresponding path program 39 times [2022-02-15 01:18:49,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:49,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566420608] [2022-02-15 01:18:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:49,490 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:49,490 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:49,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:49,491 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:50,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:50,390 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:50,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566420608] [2022-02-15 01:18:50,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [566420608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:50,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:50,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:18:50,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792541464] [2022-02-15 01:18:50,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:50,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:18:50,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:18:50,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:18:50,391 INFO L87 Difference]: Start difference. First operand 3378 states and 3935 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:01,403 INFO L93 Difference]: Finished difference Result 4878 states and 5594 transitions. [2022-02-15 01:19:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:19:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:19:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:01,408 INFO L225 Difference]: With dead ends: 4878 [2022-02-15 01:19:01,408 INFO L226 Difference]: Without dead ends: 4366 [2022-02-15 01:19:01,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:19:01,410 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 174 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:01,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 44 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:19:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2022-02-15 01:19:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3605. [2022-02-15 01:19:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3600 states have (on average 1.1647222222222222) internal successors, (4193), 3600 states have internal predecessors, (4193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 4197 transitions. [2022-02-15 01:19:09,575 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 4197 transitions. Word has length 93 [2022-02-15 01:19:09,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:09,575 INFO L470 AbstractCegarLoop]: Abstraction has 3605 states and 4197 transitions. [2022-02-15 01:19:09,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:09,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 4197 transitions. [2022-02-15 01:19:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:19:09,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:09,579 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:09,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 01:19:09,580 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash -102388934, now seen corresponding path program 40 times [2022-02-15 01:19:09,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:09,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92506362] [2022-02-15 01:19:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:09,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:09,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:09,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:09,582 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:09,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:09,828 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 01:19:09,828 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:09,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92506362] [2022-02-15 01:19:09,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [92506362] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:09,828 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:09,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:19:09,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535714002] [2022-02-15 01:19:09,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:09,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:19:09,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:19:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:19:09,829 INFO L87 Difference]: Start difference. First operand 3605 states and 4197 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:50,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:50,769 INFO L93 Difference]: Finished difference Result 17225 states and 20465 transitions. [2022-02-15 01:19:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:19:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:19:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:50,791 INFO L225 Difference]: With dead ends: 17225 [2022-02-15 01:19:50,792 INFO L226 Difference]: Without dead ends: 17117 [2022-02-15 01:19:50,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:19:50,796 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 437 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3288 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:50,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 266 Invalid, 3318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3288 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:19:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17117 states. [2022-02-15 01:19:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17117 to 3605. [2022-02-15 01:19:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3600 states have (on average 1.1647222222222222) internal successors, (4193), 3600 states have internal predecessors, (4193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 4197 transitions. [2022-02-15 01:19:59,168 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 4197 transitions. Word has length 93 [2022-02-15 01:19:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:59,168 INFO L470 AbstractCegarLoop]: Abstraction has 3605 states and 4197 transitions. [2022-02-15 01:19:59,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 4197 transitions. [2022-02-15 01:19:59,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-15 01:19:59,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:59,172 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:59,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 01:19:59,173 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash -291944894, now seen corresponding path program 41 times [2022-02-15 01:19:59,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:59,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977034509] [2022-02-15 01:19:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:59,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:59,174 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:59,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:59,175 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:59,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:59,354 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:59,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977034509] [2022-02-15 01:19:59,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977034509] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:59,354 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:59,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:19:59,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446749371] [2022-02-15 01:19:59,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:59,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:19:59,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:59,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:19:59,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:19:59,355 INFO L87 Difference]: Start difference. First operand 3605 states and 4197 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:27,469 INFO L93 Difference]: Finished difference Result 11576 states and 13666 transitions. [2022-02-15 01:20:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:20:27,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-02-15 01:20:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:27,483 INFO L225 Difference]: With dead ends: 11576 [2022-02-15 01:20:27,483 INFO L226 Difference]: Without dead ends: 11357 [2022-02-15 01:20:27,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:20:27,485 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 414 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:27,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 177 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:20:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11357 states. [2022-02-15 01:20:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11357 to 3605. [2022-02-15 01:20:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3600 states have (on average 1.1647222222222222) internal successors, (4193), 3600 states have internal predecessors, (4193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 4197 transitions. [2022-02-15 01:20:35,970 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 4197 transitions. Word has length 94 [2022-02-15 01:20:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:35,970 INFO L470 AbstractCegarLoop]: Abstraction has 3605 states and 4197 transitions. [2022-02-15 01:20:35,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 4197 transitions. [2022-02-15 01:20:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-15 01:20:35,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:35,975 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:35,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 01:20:35,976 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:35,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:35,976 INFO L85 PathProgramCache]: Analyzing trace with hash 955226037, now seen corresponding path program 10 times [2022-02-15 01:20:35,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:35,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641047939] [2022-02-15 01:20:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:35,977 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:35,977 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:35,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:35,978 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:36,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:36,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:36,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641047939] [2022-02-15 01:20:36,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [641047939] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:36,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:36,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:20:36,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413322477] [2022-02-15 01:20:36,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:36,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:20:36,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:20:36,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:20:36,248 INFO L87 Difference]: Start difference. First operand 3605 states and 4197 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:38,893 INFO L93 Difference]: Finished difference Result 24709 states and 29438 transitions. [2022-02-15 01:21:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:21:38,893 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-02-15 01:21:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:38,929 INFO L225 Difference]: With dead ends: 24709 [2022-02-15 01:21:38,930 INFO L226 Difference]: Without dead ends: 24642 [2022-02-15 01:21:38,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:21:38,937 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 551 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6236 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 6263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 6236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:38,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 386 Invalid, 6263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 6236 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 01:21:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24642 states. [2022-02-15 01:21:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24642 to 3607. [2022-02-15 01:21:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3607 states, 3602 states have (on average 1.1649083842309829) internal successors, (4196), 3602 states have internal predecessors, (4196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 4200 transitions. [2022-02-15 01:21:47,703 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 4200 transitions. Word has length 94 [2022-02-15 01:21:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:47,703 INFO L470 AbstractCegarLoop]: Abstraction has 3607 states and 4200 transitions. [2022-02-15 01:21:47,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 4200 transitions. [2022-02-15 01:21:47,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:21:47,707 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:47,708 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:47,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 01:21:47,708 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:47,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:47,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2054113192, now seen corresponding path program 42 times [2022-02-15 01:21:47,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:47,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60384779] [2022-02-15 01:21:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:47,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:47,709 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:47,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:47,711 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:21:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:47,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:47,863 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 01:21:47,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:47,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60384779] [2022-02-15 01:21:47,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [60384779] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:47,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:47,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:21:47,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305541629] [2022-02-15 01:21:47,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:47,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:21:47,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:21:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:21:47,864 INFO L87 Difference]: Start difference. First operand 3607 states and 4200 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:02,982 INFO L93 Difference]: Finished difference Result 6382 states and 7456 transitions. [2022-02-15 01:22:02,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:22:02,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:22:02,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:02,988 INFO L225 Difference]: With dead ends: 6382 [2022-02-15 01:22:02,988 INFO L226 Difference]: Without dead ends: 5888 [2022-02-15 01:22:02,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:22:02,989 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 244 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:02,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 109 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:22:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5888 states. [2022-02-15 01:22:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5888 to 3869. [2022-02-15 01:22:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3864 states have (on average 1.160455486542443) internal successors, (4484), 3864 states have internal predecessors, (4484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 4488 transitions. [2022-02-15 01:22:12,232 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 4488 transitions. Word has length 95 [2022-02-15 01:22:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:12,232 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 4488 transitions. [2022-02-15 01:22:12,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 4488 transitions. [2022-02-15 01:22:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:22:12,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:12,237 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:12,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 01:22:12,237 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:12,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1917202559, now seen corresponding path program 43 times [2022-02-15 01:22:12,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:12,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822810099] [2022-02-15 01:22:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:12,238 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:12,238 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:12,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:12,240 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:12,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:12,497 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:12,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822810099] [2022-02-15 01:22:12,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [822810099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:12,497 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:12,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:22:12,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175872019] [2022-02-15 01:22:12,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:12,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:22:12,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:22:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:22:12,498 INFO L87 Difference]: Start difference. First operand 3869 states and 4488 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:02,847 INFO L93 Difference]: Finished difference Result 18853 states and 22389 transitions. [2022-02-15 01:23:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:23:02,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-15 01:23:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:02,872 INFO L225 Difference]: With dead ends: 18853 [2022-02-15 01:23:02,872 INFO L226 Difference]: Without dead ends: 18745 [2022-02-15 01:23:02,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:23:02,876 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 460 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4096 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 4126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:02,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 295 Invalid, 4126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4096 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:23:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18745 states. [2022-02-15 01:23:12,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18745 to 3869. [2022-02-15 01:23:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3864 states have (on average 1.160455486542443) internal successors, (4484), 3864 states have internal predecessors, (4484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 4488 transitions. [2022-02-15 01:23:12,338 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 4488 transitions. Word has length 95 [2022-02-15 01:23:12,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:12,339 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 4488 transitions. [2022-02-15 01:23:12,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 4488 transitions. [2022-02-15 01:23:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-15 01:23:12,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:12,342 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:12,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 01:23:12,342 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:12,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:12,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2109118051, now seen corresponding path program 44 times [2022-02-15 01:23:12,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:12,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516621359] [2022-02-15 01:23:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:12,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:12,344 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:12,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:12,346 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:23:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:12,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:12,567 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:12,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516621359] [2022-02-15 01:23:12,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516621359] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:12,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:12,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:23:12,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648719971] [2022-02-15 01:23:12,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:12,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:23:12,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:12,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:23:12,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:23:12,568 INFO L87 Difference]: Start difference. First operand 3869 states and 4488 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:47,650 INFO L93 Difference]: Finished difference Result 13194 states and 15580 transitions. [2022-02-15 01:23:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:23:47,650 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-02-15 01:23:47,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:47,665 INFO L225 Difference]: With dead ends: 13194 [2022-02-15 01:23:47,665 INFO L226 Difference]: Without dead ends: 12975 [2022-02-15 01:23:47,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:23:47,668 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 380 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:47,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 205 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:23:47,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2022-02-15 01:23:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 3869. [2022-02-15 01:23:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3864 states have (on average 1.160455486542443) internal successors, (4484), 3864 states have internal predecessors, (4484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 4488 transitions. [2022-02-15 01:23:57,143 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 4488 transitions. Word has length 96 [2022-02-15 01:23:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:57,143 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 4488 transitions. [2022-02-15 01:23:57,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 4488 transitions. [2022-02-15 01:23:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-15 01:23:57,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:57,147 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:57,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 01:23:57,147 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:57,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:57,147 INFO L85 PathProgramCache]: Analyzing trace with hash -861947120, now seen corresponding path program 11 times [2022-02-15 01:23:57,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:57,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529391866] [2022-02-15 01:23:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:57,148 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:57,148 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:57,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:57,150 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:23:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:57,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:57,477 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:57,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529391866] [2022-02-15 01:23:57,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [529391866] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:57,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:57,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:23:57,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263857039] [2022-02-15 01:23:57,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:57,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:23:57,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:57,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:23:57,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:23:57,478 INFO L87 Difference]: Start difference. First operand 3869 states and 4488 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:15,243 INFO L93 Difference]: Finished difference Result 27858 states and 33186 transitions. [2022-02-15 01:25:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:25:15,243 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-02-15 01:25:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:15,284 INFO L225 Difference]: With dead ends: 27858 [2022-02-15 01:25:15,285 INFO L226 Difference]: Without dead ends: 27791 [2022-02-15 01:25:15,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1926, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:25:15,293 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 703 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 7038 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 7078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 7038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:15,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 410 Invalid, 7078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 7038 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 01:25:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27791 states. [2022-02-15 01:25:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27791 to 3873. [2022-02-15 01:25:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3868 states have (on average 1.1608066184074457) internal successors, (4490), 3868 states have internal predecessors, (4490), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 4494 transitions. [2022-02-15 01:25:25,244 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 4494 transitions. Word has length 96 [2022-02-15 01:25:25,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:25,244 INFO L470 AbstractCegarLoop]: Abstraction has 3873 states and 4494 transitions. [2022-02-15 01:25:25,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:25,245 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 4494 transitions. [2022-02-15 01:25:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-15 01:25:25,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:25,262 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:25,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 01:25:25,262 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1743061085, now seen corresponding path program 45 times [2022-02-15 01:25:25,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:25,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248006614] [2022-02-15 01:25:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:25,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:25,264 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:25,265 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:25,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:25:25,419 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:25,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248006614] [2022-02-15 01:25:25,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248006614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:25,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:25,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:25:25,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841888697] [2022-02-15 01:25:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:25,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:25:25,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:25:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:25:25,420 INFO L87 Difference]: Start difference. First operand 3873 states and 4494 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:46,498 INFO L93 Difference]: Finished difference Result 8032 states and 9403 transitions. [2022-02-15 01:25:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:25:46,499 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-02-15 01:25:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:46,506 INFO L225 Difference]: With dead ends: 8032 [2022-02-15 01:25:46,506 INFO L226 Difference]: Without dead ends: 7538 [2022-02-15 01:25:46,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:25:46,508 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 362 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:46,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 128 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:25:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2022-02-15 01:25:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 3873. [2022-02-15 01:25:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3868 states have (on average 1.1608066184074457) internal successors, (4490), 3868 states have internal predecessors, (4490), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 4494 transitions. [2022-02-15 01:25:56,200 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 4494 transitions. Word has length 97 [2022-02-15 01:25:56,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:56,200 INFO L470 AbstractCegarLoop]: Abstraction has 3873 states and 4494 transitions. [2022-02-15 01:25:56,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 4494 transitions. [2022-02-15 01:25:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-15 01:25:56,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:56,203 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:56,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 01:25:56,203 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1419409540, now seen corresponding path program 46 times [2022-02-15 01:25:56,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:56,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898141838] [2022-02-15 01:25:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:56,205 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:56,205 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:56,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:56,206 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:56,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:56,468 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 01:25:56,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:56,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898141838] [2022-02-15 01:25:56,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [898141838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:56,471 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:56,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:25:56,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974822139] [2022-02-15 01:25:56,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:56,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:25:56,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:25:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:25:56,472 INFO L87 Difference]: Start difference. First operand 3873 states and 4494 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:26:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:26:55,594 INFO L93 Difference]: Finished difference Result 20483 states and 24316 transitions. [2022-02-15 01:26:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:26:55,594 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-02-15 01:26:55,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:26:55,620 INFO L225 Difference]: With dead ends: 20483 [2022-02-15 01:26:55,620 INFO L226 Difference]: Without dead ends: 20375 [2022-02-15 01:26:55,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:26:55,626 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 501 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4736 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 4768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:26:55,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 319 Invalid, 4768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 4736 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:26:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20375 states. [2022-02-15 01:27:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20375 to 3873. [2022-02-15 01:27:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3868 states have (on average 1.1608066184074457) internal successors, (4490), 3868 states have internal predecessors, (4490), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 4494 transitions. [2022-02-15 01:27:05,577 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 4494 transitions. Word has length 97 [2022-02-15 01:27:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:05,577 INFO L470 AbstractCegarLoop]: Abstraction has 3873 states and 4494 transitions. [2022-02-15 01:27:05,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 4494 transitions. [2022-02-15 01:27:05,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-15 01:27:05,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:05,581 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:05,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 01:27:05,581 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:05,581 INFO L85 PathProgramCache]: Analyzing trace with hash -360832456, now seen corresponding path program 47 times [2022-02-15 01:27:05,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:05,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281341418] [2022-02-15 01:27:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:05,583 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:05,583 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:05,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:05,584 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:05,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:05,853 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:05,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281341418] [2022-02-15 01:27:05,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1281341418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:05,853 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:05,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:27:05,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640744711] [2022-02-15 01:27:05,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:05,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:27:05,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:27:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:27:05,854 INFO L87 Difference]: Start difference. First operand 3873 states and 4494 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)